EUVD-2026-31440Published

shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`

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cve-program · CVE-2026-9277

Published

shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.

Source published: 22 May 2026 13:22:38 UTC
Source modified: 14 Sep 2026 12:04:27 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0 · 9.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

euvd · EUVD-2026-31440

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: May 22, 2026, 1:22:38 PM

dateUpdated: Sep 14, 2026, 12:04:27 PM

39 related source bulletins · separate from aliases

RHSA-2026:41928: Red Hat Security Advisory: Red Hat Migration Toolkit for Containers

CVE-2025-7783 · CVE-2025-12816 · CVE-2025-13465 · CVE-2025-15284 · CVE-2025-52881 · CVE-2025-58183 · CVE-2025-58754 · CVE-2025-61726 · CVE-2025-61729 · CVE-2025-62718 · CVE-2025-66031 · CVE-2025-66418 · CVE-2025-66471 · CVE-2025-66506 · CVE-2025-68121 · CVE-2025-69223 · CVE-2025-69227 · CVE-2025-69228 · CVE-2026-4800 · CVE-2026-6322 · CVE-2026-9277 · CVE-2026-9595 · CVE-2026-12143 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-21441 · CVE-2026-22029 · CVE-2026-23490 · CVE-2026-23745 · CVE-2026-25679 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27137 · CVE-2026-29063 · CVE-2026-30922 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32283 · CVE-2026-33186 · CVE-2026-33810 · CVE-2026-33811 · CVE-2026-34986 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-40895 · CVE-2026-42264 · CVE-2026-42338 · CVE-2026-42499 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-45736 · CVE-2026-45822 · CVE-2026-48779

RHSA-2026:62410: Red Hat Security Advisory: OpenShift Container Platform 4.14.73 bug fix and security update

CVE-2026-9277 · CVE-2026-33814 · CVE-2026-54423

openSUSE-SU-2026:10861-1: python311-pytest-html-4.2.0-2.1 on GA media

CVE-2026-9277

RHSA-2026:28571: Red Hat Security Advisory: Red Hat Quay 3.9.23

CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-44432 · CVE-2026-44496 · CVE-2026-48526

RHSA-2026:29197: Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage

CVE-2024-12086 · CVE-2025-14087 · CVE-2025-14512 · CVE-2026-3832 · CVE-2026-3833 · CVE-2026-4046 · CVE-2026-4437 · CVE-2026-4438 · CVE-2026-4878 · CVE-2026-5260 · CVE-2026-5419 · CVE-2026-6322 · CVE-2026-7383 · CVE-2026-9076 · CVE-2026-9277 · CVE-2026-28390 · CVE-2026-29518 · CVE-2026-33845 · CVE-2026-33846 · CVE-2026-34180 · CVE-2026-34181 · CVE-2026-34182 · CVE-2026-34183 · CVE-2026-40355 · CVE-2026-40356 · CVE-2026-41035 · CVE-2026-42009 · CVE-2026-42010 · CVE-2026-42011 · CVE-2026-42012 · CVE-2026-42013 · CVE-2026-42014 · CVE-2026-42015 · CVE-2026-42764 · CVE-2026-42766 · CVE-2026-42767 · CVE-2026-42768 · CVE-2026-42769 · CVE-2026-42770 · CVE-2026-43618 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-45186 · CVE-2026-45445 · CVE-2026-45446 · CVE-2026-45447 · CVE-2026-45736 · CVE-2026-48779

RHSA-2026:29834: Red Hat Security Advisory: OpenShift Container Platform 4.21.22 bug fix and security update

CVE-2026-6322 · CVE-2026-9277

RHSA-2026:48699: Red Hat Security Advisory: OpenShift Container Platform 4.18.51 bug fix and security update

CVE-2026-4800 · CVE-2026-9277 · CVE-2026-16242 · CVE-2026-33186 · CVE-2026-40895 · CVE-2026-42154

RHSA-2026:34342: Red Hat Security Advisory: Cluster Observability Operator 1.5.0

CVE-2020-7753 · CVE-2021-33623 · CVE-2024-4068 · CVE-2024-45338 · CVE-2024-52011 · CVE-2025-22868 · CVE-2025-22870 · CVE-2025-22872 · CVE-2025-47911 · CVE-2025-58190 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-4800 · CVE-2026-4867 · CVE-2026-6321 · CVE-2026-6322 · CVE-2026-6734 · CVE-2026-9277 · CVE-2026-9697 · CVE-2026-12143 · CVE-2026-12151 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-29063 · CVE-2026-32141 · CVE-2026-33228 · CVE-2026-33671 · CVE-2026-33814 · CVE-2026-33891 · CVE-2026-33894 · CVE-2026-33895 · CVE-2026-33896 · CVE-2026-33937 · CVE-2026-33938 · CVE-2026-33939 · CVE-2026-33940 · CVE-2026-33941 · CVE-2026-39821 · CVE-2026-42506 · CVE-2026-48779

RHSA-2026:26079: Red Hat Security Advisory: Kiali 2.17.9 for Red Hat OpenShift Service Mesh 3.2

CVE-2026-9277 · CVE-2026-32281

RHSA-2026:26090: Red Hat Security Advisory: Kiali 2.22.5 for Red Hat OpenShift Service Mesh 3.3

CVE-2026-9277 · CVE-2026-32281 · CVE-2026-44293

RHSA-2026:62260: Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.30.0 Release.

CVE-2025-55163 · CVE-2026-8286 · CVE-2026-9277 · CVE-2026-9547 · CVE-2026-9563 · CVE-2026-10050 · CVE-2026-10051 · CVE-2026-12143 · CVE-2026-12151 · CVE-2026-13149 · CVE-2026-15075 · CVE-2026-15076 · CVE-2026-27136 · CVE-2026-34986 · CVE-2026-39820 · CVE-2026-39831 · CVE-2026-39835 · CVE-2026-40898 · CVE-2026-40983 · CVE-2026-40984 · CVE-2026-41242 · CVE-2026-41695 · CVE-2026-41716 · CVE-2026-42264 · CVE-2026-42499 · CVE-2026-44705 · CVE-2026-45149 · CVE-2026-45416 · CVE-2026-45623 · CVE-2026-45674 · CVE-2026-46597 · CVE-2026-46681 · CVE-2026-47691 · CVE-2026-48020 · CVE-2026-48068 · CVE-2026-48491 · CVE-2026-49978 · CVE-2026-50010 · CVE-2026-50193 · CVE-2026-53488 · CVE-2026-53492 · CVE-2026-53622 · CVE-2026-54399 · CVE-2026-54428 · CVE-2026-54512 · CVE-2026-54513 · CVE-2026-54763 · CVE-2026-55831 · CVE-2026-55833 · CVE-2026-56745 · CVE-2026-56746 · CVE-2026-56819 · CVE-2026-59296 · CVE-2026-59869 · CVE-2026-59873 · CVE-2026-59874 · CVE-2026-59877 · CVE-2026-59888 · CVE-2026-59899 · CVE-2026-65600 · CVE-2026-65601 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-68494 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73566 · CVE-2026-73646 · CVE-2026-75838

openSUSE-SU-2026:20919-1: Security update for agama-web-ui

CVE-2025-7339 · CVE-2026-42041 · CVE-2026-42264 · CVE-2026-9277

RHSA-2026:26077: Red Hat Security Advisory: Kiali 2.11.12 for Red Hat OpenShift Service Mesh 3.1

CVE-2026-9277 · CVE-2026-32281

RHSA-2026:70267: Red Hat Security Advisory: Red Hat Quay 3.14.9

CVE-2026-4427 · CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-14257 · CVE-2026-15792 · CVE-2026-15927 · CVE-2026-16221 · CVE-2026-18255 · CVE-2026-32591 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39822 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44705 · CVE-2026-44990 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-48526 · CVE-2026-49477 · CVE-2026-54058 · CVE-2026-54060 · CVE-2026-55379 · CVE-2026-55380 · CVE-2026-56852 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-57231 · CVE-2026-59197 · CVE-2026-59199 · CVE-2026-59200 · CVE-2026-59204 · CVE-2026-59205 · CVE-2026-59869 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67313 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-84375

RHSA-2026:40765: Red Hat Security Advisory: OpenShift Container Platform 4.19.39 bug fix and security update

CVE-2026-9277 · CVE-2026-13676

RHSA-2026:36754: Red Hat Security Advisory: Red Hat Developer Hub 1.10.2 release.

CVE-2026-6322 · CVE-2026-6734 · CVE-2026-9277 · CVE-2026-9673 · CVE-2026-9697 · CVE-2026-12143 · CVE-2026-12151 · CVE-2026-24781 · CVE-2026-27136 · CVE-2026-39820 · CVE-2026-42338 · CVE-2026-42499 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-45736 · CVE-2026-47131 · CVE-2026-47135 · CVE-2026-47137 · CVE-2026-47139 · CVE-2026-47140 · CVE-2026-47141 · CVE-2026-47208 · CVE-2026-47210 · CVE-2026-48779

RHSA-2026:28010: Red Hat Security Advisory: Red Hat build of Cryostat security update

CVE-2025-48431 · CVE-2026-9277 · CVE-2026-32281 · CVE-2026-41240 · CVE-2026-42578 · CVE-2026-42579 · CVE-2026-42581 · CVE-2026-42584 · CVE-2026-42587 · CVE-2026-43869

RHSA-2026:30076: Red Hat Security Advisory: Red Hat Quay 3.12.19

CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-44432 · CVE-2026-44496 · CVE-2026-48526

WID-SEC-W-2026-1934: Red Hat OpenShift Service Mesh: Schwachstelle ermöglicht Codeausführung

CVE-2026-9277

RHSA-2026:26072: Red Hat Security Advisory: Kiali 1.73.32 for Red Hat OpenShift Service Mesh 2.6

CVE-2026-9277

RHSA-2026:44263: Red Hat Security Advisory: OpenShift Container Platform 4.20.31 bug fix and security update

CVE-2026-9277 · CVE-2026-12143 · CVE-2026-40895 · CVE-2026-42154 · CVE-2026-42338 · CVE-2026-45736 · CVE-2026-59869 · CVE-2026-59873

RHSA-2026:29795: Red Hat Security Advisory: OpenShift Container Platform 4.22.3 bug fix and security update

CVE-2026-4800 · CVE-2026-6322 · CVE-2026-9277 · CVE-2026-35469 · CVE-2026-44293

RHSA-2026:93951: Red Hat Security Advisory: OpenShift Virtualization v4.17 Images

CVE-2026-9277 · CVE-2026-59879 · CVE-2026-84375

RHSA-2026:44237: Red Hat Security Advisory: OpenShift Container Platform 4.22.7 bug fix and security update

CVE-2026-9277 · CVE-2026-27136 · CVE-2026-35469 · CVE-2026-42338 · CVE-2026-59869 · CVE-2026-59873

RHSA-2026:54395: Red Hat Security Advisory: Red Hat Quay 3.17.4

CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-15927 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44990 · CVE-2026-46597 · CVE-2026-54058 · CVE-2026-54060 · CVE-2026-55379 · CVE-2026-55380 · CVE-2026-57231 · CVE-2026-59197 · CVE-2026-59199 · CVE-2026-59200 · CVE-2026-59204 · CVE-2026-59205 · CVE-2026-59869 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-73086

RHSA-2026:60023: Red Hat Security Advisory: OpenShift Container Platform 4.17.57 bug fix and security update

CVE-2026-4800 · CVE-2026-9277 · CVE-2026-25681 · CVE-2026-33814 · CVE-2026-34986 · CVE-2026-35469 · CVE-2026-39820 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-46597 · CVE-2026-49332 · CVE-2026-50236 · CVE-2026-50237

RHSA-2026:33574: Red Hat Security Advisory: Red Hat Developer Hub 1.9.6 release.

CVE-2026-9277 · CVE-2026-9673 · CVE-2026-27145 · CVE-2026-33811 · CVE-2026-39820 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043 · CVE-2026-42044 · CVE-2026-42338 · CVE-2026-42499 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44724 · CVE-2026-45736 · CVE-2026-47131 · CVE-2026-47135 · CVE-2026-47137 · CVE-2026-47139 · CVE-2026-47140 · CVE-2026-47141 · CVE-2026-47208 · CVE-2026-47209 · CVE-2026-48779

RHSA-2026:70647: Red Hat Security Advisory: OpenShift Container Platform 4.12.99 bug fix and security update

CVE-2026-1784 · CVE-2026-9277 · CVE-2026-33814 · CVE-2026-33818 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-75885 · CVE-2026-75887

openSUSE-SU-2026:10979-1: agama-web-ui-21+360.16caae772-44.1 on GA media

CVE-2026-6402 · CVE-2026-9277

RHSA-2026:50850: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.1 security update

CVE-2026-9277 · CVE-2026-43997 · CVE-2026-43998 · CVE-2026-43999 · CVE-2026-44000 · CVE-2026-44001 · CVE-2026-44002 · CVE-2026-44003 · CVE-2026-44004 · CVE-2026-44005 · CVE-2026-44006 · CVE-2026-44007 · CVE-2026-44008 · CVE-2026-44009 · CVE-2026-45411 · CVE-2026-47131 · CVE-2026-47135 · CVE-2026-47137 · CVE-2026-47139 · CVE-2026-47140 · CVE-2026-47141 · CVE-2026-47209 · CVE-2026-48068 · CVE-2026-48801 · CVE-2026-59877

openSUSE-SU-2026:20839-1: Security update for python-pytest-html

CVE-2026-9277

RHSA-2026:42796: Red Hat Security Advisory: Red Hat Quay 3.15.6

CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-32591 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44990 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-48526

RHSA-2026:26225: Red Hat Security Advisory: Technical preview of the satellite/iop-vulnerability-frontend-rhel9 container image

CVE-2026-6322 · CVE-2026-9277 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-29063 · CVE-2026-41680 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043 · CVE-2026-42044

RHSA-2026:65840: Red Hat Security Advisory: OpenShift Container Platform 4.13.71 bug fix and security update

CVE-2025-68121 · CVE-2026-9277 · CVE-2026-27143 · CVE-2026-27144 · CVE-2026-32280 · CVE-2026-33186 · CVE-2026-33814 · CVE-2026-39820 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-44496

RHSA-2026:26080: Red Hat Security Advisory: Kiali 2.4.18 for Red Hat OpenShift Service Mesh 3.0

CVE-2026-9277 · CVE-2026-32281

RHSA-2026:34791: Red Hat Security Advisory: OpenShift Container Platform 4.20.28 bug fix and security update

CVE-2026-9277 · CVE-2026-35469

RHSA-2026:44267: Red Hat Security Advisory: OpenShift Container Platform 4.21.26 bug fix and security update

CVE-2026-9277 · CVE-2026-12143 · CVE-2026-34986 · CVE-2026-35469 · CVE-2026-40895 · CVE-2026-42338 · CVE-2026-45736 · CVE-2026-59869 · CVE-2026-59873

RHSA-2026:41066: Red Hat Security Advisory: Red Hat Quay 3.16.5

CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-13676 · CVE-2026-32281 · CVE-2026-32591 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42044 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44990 · CVE-2026-45822 · CVE-2026-46597 · CVE-2026-48526

RHSA-2026:33683: Red Hat Security Advisory: Red Hat Quay 3.10.23

CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-44432 · CVE-2026-44496 · CVE-2026-48526

Source published: May 22, 2026, 1:22:38 PM (timezone not stated)
Source modified: Sep 14, 2026, 12:04:27 PM (timezone not stated)
Saved here: 11 Nov 2026 18:10:27 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 4.0 · 9.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

nvd · CVE-2026-9277

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-77 · CWE-78

Original publisher date fields

published: 2026-05-22T14:16:30.330

lastModified: 2026-09-14T13:19:33.133

Source published: 22 May 2026 14:16:30 UTC
Source modified: 14 Sep 2026 13:19:33 UTC
Saved here: 25 Oct 2026 16:19:22 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 7ffcee3d-2c14-4c3e-b844-86c6a321a158 · Secondary · 9.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · 7ffcee3d-2c14-4c3e-b844-86c6a321a158 · Secondary · 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary · 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

osv · GHSA-w7jw-789q-3m8p

Published

### Summary `shell-quote`'s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (`\n`, `\r`, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal `\n` as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways. Neither requires the parser to misbehave — `parse()` only emits ops from a fixed control set — but both are documented API surface: 1. **Direct construction.** A caller builds `{ op: '...\n...' }` from external input (e.g. a deserialized argument array) and passes it to `quote()`. 2. **`envFn` return.** `parse(cmd, envFn)` is documented to splice the return value of `envFn` into the result array when it is an object. An attacker-influenced data source consulted by `envFn` can introduce an object token whose `.op` reaches `quote()`. ### Impact Shell command injection in callers that pass object tokens with attacker-influenced `.op` values to `quote()` and then hand the result to a shell. The preconditions are narrower than ordinary string injection — they require the caller to feed object tokens into `quote()` — but object tokens are a public, documented part of the API surface, and `quote()` is intended to be a shell-safety boundary. ### PoC ```js const { parse, quote } = require('shell-quote'); // Direct construction quote([{ op: ';\nid' }]); // → "\;\n\\i\\d" ← literal newline; second line executes as a command // Via parse() with an envFn returning attacker-shaped objects const tokens = parse('echo $X', () => ({ op: ';\nid' })); require('child_process').execSync(quote(tokens), { shell: true }); // Executes `id` after `echo \;`. ``` Confirmed under `sh`, `bash`, `dash`, and `zsh`. ### Patch Fixed by replacing the per-character escape with strict shape validation in `quote()`. The object-token branch now: - **`{ op }`** — `.op` must be a string from the same allowlist the parser emits (`||`, `&&`, `;;`, `|&`, `<(`, `<<<`, `>>`, `>&`, `<&`, `&`, `;`, `(`, `)`, `|`, `<`, `>`). Anything else throws `TypeError`. This is the direct fix for the reported issue and removes the entire class of `.op` injection. - **`{ op: 'glob', pattern }`** — `.pattern` must be a string with no line terminators. Glob metacharacters (`*`, `?`, `[`, `]`, `{`, `}`, `,`) pass through; all other shell-special characters are backslash-escaped. (Previously the pattern field was discarded entirely and the literal string `\g\l\o\b` was emitted — a latent bug, not security-relevant.) - **`{ comment }`** — `.comment` must be a string with no line terminators (line terminators would end the shell comment and resume command parsing — same injection shape). - **Any other object shape** — `TypeError`. The fix is allowlist-based rather than a targeted regex tweak, so it closes the reported vector and forecloses adjacent ones (U+2028 / U+2029 line separators in `.op`, line terminators in comments, unknown-shape objects coerced through `.replace`). ### Workarounds Prior to upgrading, callers that build object tokens from untrusted input should validate `.op` against the parser's operator set themselves, and never construct `{ op }` from attacker-controlled strings. ### Credits Reported by Akshat Sinha

Source published: 9 Jun 2026 14:27:15 UTC
Source modified: 10 Sep 2026 03:50:50 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Publisher rating · CRITICAL