GHSA-4cwx-7wf7-3272Published

undici vulnerable to cross-user information disclosure and parse-time crash via degenerate private cache directives

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cve-program · CVE-2026-13697

Published

undici's cache interceptor mishandles malformed Cache-Control private directives. In undici 7.0.0 up to before 7.29.0 and 8.0.0 up to before 8.9.0, a response carrying a degenerate qualified private directive, such as private set to an empty value, can be stored in the default shared cache and later served to a different caller with the same cache key, disclosing private response bodies and headers including Set-Cookie. Separately, a Cache-Control header that combines an unqualified private directive with a qualified one triggers an uncaught TypeError in the cache-control parser, which rejects the request and, depending on the consumer's error handling, can terminate the process. Both issues affect applications using the cache interceptor in shared mode, including the default configuration. The issues are fixed in undici 7.29.0 and 8.9.0.

Source published: 29 Jul 2026 16:32:39 UTC
Source modified: 29 Jul 2026 17:53:57 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 · 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

euvd · EUVD-2026-50409

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: Jul 29, 2026, 4:32:39 PM

dateUpdated: Jul 29, 2026, 5:53:57 PM

10 related source bulletins · separate from aliases

WID-SEC-W-2026-3621: IBM App Connect Enterprise: Mehrere Schwachstellen

CVE-2022-35948 · CVE-2026-13697 · CVE-2026-14643 · CVE-2026-15157 · CVE-2026-1527 · CVE-2026-16728 · CVE-2026-16729 · CVE-2026-59871 · CVE-2026-59873 · CVE-2026-59874 · CVE-2026-59875 · CVE-2026-92595 · CVE-2026-92596 · CVE-2026-92597 · CVE-2026-92598 · CVE-2026-9678

RHSA-2026:48273: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-13697 · CVE-2026-14643 · CVE-2026-15157 · CVE-2026-16728 · CVE-2026-16729 · CVE-2026-56847 · CVE-2026-56850 · CVE-2026-58039 · CVE-2026-58040 · CVE-2026-58043

RHSA-2026:48537: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

CVE-2026-13697 · CVE-2026-14643 · CVE-2026-15157 · CVE-2026-16728 · CVE-2026-16729 · CVE-2026-56846 · CVE-2026-56847 · CVE-2026-56850 · CVE-2026-58039 · CVE-2026-58040 · CVE-2026-58041 · CVE-2026-58042 · CVE-2026-58043 · CVE-2026-58044 · CVE-2026-58045

RHSA-2026:90321: Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.31.0 Release.

CVE-2023-54404 · CVE-2025-62718 · CVE-2026-8643 · CVE-2026-9496 · CVE-2026-12185 · CVE-2026-13697 · CVE-2026-14682 · CVE-2026-15076 · CVE-2026-16308 · CVE-2026-17106 · CVE-2026-18427 · CVE-2026-19203 · CVE-2026-19534 · CVE-2026-39820 · CVE-2026-41178 · CVE-2026-41707 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-45416 · CVE-2026-47884 · CVE-2026-47886 · CVE-2026-47888 · CVE-2026-47890 · CVE-2026-47892 · CVE-2026-50010 · CVE-2026-55831 · CVE-2026-55833 · CVE-2026-55851 · CVE-2026-56745 · CVE-2026-56746 · CVE-2026-56819 · CVE-2026-56852 · CVE-2026-56854 · CVE-2026-58062 · CVE-2026-59280 · CVE-2026-59282 · CVE-2026-59283 · CVE-2026-59296 · CVE-2026-59313 · CVE-2026-59323 · CVE-2026-59651 · CVE-2026-59887 · CVE-2026-59899 · CVE-2026-59901 · CVE-2026-62243 · CVE-2026-64607 · CVE-2026-67213 · CVE-2026-67312 · CVE-2026-67313 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-68494 · CVE-2026-68497 · CVE-2026-69152 · CVE-2026-69192 · CVE-2026-71290 · CVE-2026-71324 · CVE-2026-71325 · CVE-2026-71327 · CVE-2026-73500 · CVE-2026-73508 · CVE-2026-74835 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-76169 · CVE-2026-81521 · CVE-2026-82417 · CVE-2026-82562 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394 · CVE-2026-84428 · CVE-2026-84445 · CVE-2026-84469 · CVE-2026-84504 · CVE-2026-84961 · CVE-2026-85062 · CVE-2026-85124 · CVE-2026-85152 · CVE-2026-85595 · CVE-2026-85597 · CVE-2026-86063 · CVE-2026-87743 · CVE-2026-88004 · CVE-2026-88007 · CVE-2026-88008 · CVE-2026-88009 · CVE-2026-88011 · CVE-2026-88012 · CVE-2026-88031 · CVE-2026-88878 · CVE-2026-88879 · CVE-2026-90711 · CVE-2026-93749 · CVE-2026-100655 · CVE-2026-100656 · CVE-2026-100666 · CVE-2026-101916 · CVE-2026-102925 · CVE-2026-102930 · CVE-2026-103435 · CVE-2026-109618 · CVE-2026-109619

RHSA-2026:82151: Red Hat Security Advisory: Ansible automation portal Red Hat Enterprise Linux Images

CVE-2026-13697 · CVE-2026-19534 · CVE-2026-47683 · CVE-2026-47686 · CVE-2026-47698 · CVE-2026-54284 · CVE-2026-55553 · CVE-2026-59893 · CVE-2026-71491 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-77037 · CVE-2026-82333 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394 · CVE-2026-84961 · CVE-2026-88932 · CVE-2026-92934 · CVE-2026-92935 · CVE-2026-92937 · CVE-2026-92938 · CVE-2026-92939 · CVE-2026-92940 · CVE-2026-92941 · CVE-2026-92942 · CVE-2026-92944 · CVE-2026-92946 · CVE-2026-92947 · CVE-2026-92948 · CVE-2026-92950 · CVE-2026-92951 · CVE-2026-92953 · CVE-2026-92954 · CVE-2026-92955 · CVE-2026-92956 · CVE-2026-92957 · CVE-2026-92958 · CVE-2026-92959 · CVE-2026-92960 · CVE-2026-92961 · CVE-2026-93603 · CVE-2026-93604 · CVE-2026-93605 · CVE-2026-93606

RHSA-2026:98619: Red Hat Security Advisory: nodejs26 security, bug fix, and enhancement update

CVE-2026-13697 · CVE-2026-48615 · CVE-2026-48617 · CVE-2026-48618 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48931 · CVE-2026-48933 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-56847 · CVE-2026-56848 · CVE-2026-56850 · CVE-2026-58039 · CVE-2026-58040 · CVE-2026-58041 · CVE-2026-58042 · CVE-2026-58043 · CVE-2026-58044 · CVE-2026-58045 · CVE-2026-87018 · CVE-2026-102276 · CVE-2026-102278 · CVE-2026-105482 · CVE-2026-105483 · CVE-2026-106069 · CVE-2026-109383 · CVE-2026-109829 · CVE-2026-109869

RHSA-2026:79088: Red Hat Security Advisory: Red Hat Developer Hub 1.10.5 release.

CVE-2026-13697 · CVE-2026-14456 · CVE-2026-18798 · CVE-2026-19534 · CVE-2026-47683 · CVE-2026-47686 · CVE-2026-47698 · CVE-2026-55553 · CVE-2026-63072 · CVE-2026-63076 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67422 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-77037 · CVE-2026-77078 · CVE-2026-82333 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394 · CVE-2026-84445 · CVE-2026-84961 · CVE-2026-87776 · CVE-2026-88932 · CVE-2026-89011 · CVE-2026-92934 · CVE-2026-92935 · CVE-2026-92937 · CVE-2026-92938 · CVE-2026-92939 · CVE-2026-92940 · CVE-2026-92941 · CVE-2026-92942 · CVE-2026-92944 · CVE-2026-92946 · CVE-2026-92947 · CVE-2026-92948 · CVE-2026-92950 · CVE-2026-92951 · CVE-2026-92953 · CVE-2026-92954 · CVE-2026-92955 · CVE-2026-92956 · CVE-2026-92957 · CVE-2026-92958 · CVE-2026-92959 · CVE-2026-92960 · CVE-2026-92961 · CVE-2026-93603 · CVE-2026-93604 · CVE-2026-93605 · CVE-2026-93606

RHSA-2026:86891: Red Hat Security Advisory: RHOAI 3.5.2 - Red Hat OpenShift AI

CVE-2024-14029 · CVE-2026-13697 · CVE-2026-15679 · CVE-2026-15789 · CVE-2026-18427 · CVE-2026-19534 · CVE-2026-37237 · CVE-2026-49825 · CVE-2026-49855 · CVE-2026-54284 · CVE-2026-56859 · CVE-2026-59296 · CVE-2026-59893 · CVE-2026-62243 · CVE-2026-62384 · CVE-2026-63209 · CVE-2026-63374 · CVE-2026-66007 · CVE-2026-68494 · CVE-2026-68497 · CVE-2026-69097 · CVE-2026-69112 · CVE-2026-69152 · CVE-2026-69243 · CVE-2026-69244 · CVE-2026-71281 · CVE-2026-71491 · CVE-2026-73417 · CVE-2026-73502 · CVE-2026-73508 · CVE-2026-73646 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76098 · CVE-2026-76169 · CVE-2026-76172 · CVE-2026-76222 · CVE-2026-76905 · CVE-2026-77354 · CVE-2026-77874 · CVE-2026-78676 · CVE-2026-78677 · CVE-2026-78679 · CVE-2026-78682 · CVE-2026-79674 · CVE-2026-79675 · CVE-2026-80205 · CVE-2026-81722 · CVE-2026-81724 · CVE-2026-81725 · CVE-2026-81726 · CVE-2026-81727 · CVE-2026-82397 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84381 · CVE-2026-84382 · CVE-2026-84394 · CVE-2026-84428 · CVE-2026-84445 · CVE-2026-84469 · CVE-2026-84504 · CVE-2026-84782 · CVE-2026-84961 · CVE-2026-85124 · CVE-2026-85152 · CVE-2026-85525 · CVE-2026-86332 · CVE-2026-87776 · CVE-2026-87817 · CVE-2026-87819 · CVE-2026-88029 · CVE-2026-88031 · CVE-2026-89425 · CVE-2026-91990 · CVE-2026-93348 · CVE-2026-93599 · CVE-2026-93657 · CVE-2026-93749 · CVE-2026-96749 · CVE-2026-96775 · CVE-2026-102925 · CVE-2026-102930 · CVE-2026-102937 · CVE-2026-102938 · CVE-2026-102990 · CVE-2026-104851 · CVE-2026-104852 · CVE-2026-104861 · CVE-2026-104873

RHSA-2026:97855: Red Hat Security Advisory: nodejs:26 security update

CVE-2026-13697 · CVE-2026-19534 · CVE-2026-48615 · CVE-2026-48617 · CVE-2026-48618 · CVE-2026-48619 · CVE-2026-48928 · CVE-2026-48930 · CVE-2026-48931 · CVE-2026-48933 · CVE-2026-48934 · CVE-2026-48935 · CVE-2026-48936 · CVE-2026-56846 · CVE-2026-56847 · CVE-2026-56848 · CVE-2026-56850 · CVE-2026-58039 · CVE-2026-58040 · CVE-2026-58041 · CVE-2026-58042 · CVE-2026-58043 · CVE-2026-58044 · CVE-2026-58045 · CVE-2026-84961 · CVE-2026-85152

RHSA-2026:76788: Red Hat Security Advisory: Red Hat Developer Hub 1.10.5 Plugin Catalog GA plugins release.

CVE-2026-13697 · CVE-2026-19534 · CVE-2026-47683 · CVE-2026-47686 · CVE-2026-47698 · CVE-2026-55553 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-77037 · CVE-2026-77078 · CVE-2026-77413 · CVE-2026-77414 · CVE-2026-77415 · CVE-2026-82333 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394 · CVE-2026-84961 · CVE-2026-87776 · CVE-2026-88932 · CVE-2026-89011 · CVE-2026-92934 · CVE-2026-92935 · CVE-2026-92937 · CVE-2026-92938 · CVE-2026-92939 · CVE-2026-92940 · CVE-2026-92941 · CVE-2026-92942 · CVE-2026-92944 · CVE-2026-92946 · CVE-2026-92947 · CVE-2026-92948 · CVE-2026-92950 · CVE-2026-92951 · CVE-2026-92953 · CVE-2026-92954 · CVE-2026-92955 · CVE-2026-92956 · CVE-2026-92957 · CVE-2026-92958 · CVE-2026-92959 · CVE-2026-92960 · CVE-2026-92961 · CVE-2026-93603 · CVE-2026-93604 · CVE-2026-93605 · CVE-2026-93606

Source published: Jul 29, 2026, 4:32:39 PM (timezone not stated)
Source modified: Jul 29, 2026, 5:53:57 PM (timezone not stated)
Saved here: 13 Nov 2026 06:58:38 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 3.1 · 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

nvd · CVE-2026-13697

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: Analyzed

Weakness classifications: CWE-200 · CWE-248 · CWE-525

Original publisher date fields

published: 2026-07-29T17:16:50.503

lastModified: 2026-08-04T14:17:59.003

1 source CPE criteria · context only

cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 29 Jul 2026 17:16:50 UTC
Source modified: 4 Aug 2026 14:17:59 UTC
Saved here: 25 Oct 2026 05:17:25 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 3.1 · ce714d77-add3-4f53-aff5-83d477b104bb · Secondary · 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS 3.1 · [email protected] · Primary · 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

osv · GHSA-4cwx-7wf7-3272

Published

### Summary Two issues in undici's cache interceptor, both fixed by the same patch on `lib/util/cache.js`: 1. **Shared-cache disclosure:** Responses with malformed qualified `Cache-Control: private` directives such as `private=""` or `private=","` can be incorrectly stored in the default shared cache, then served to a later caller with the same cache key. 2. **Parse-time crash:** Mixed unqualified-and-qualified `private` directives in the same header (such as `public, max-age=60, private, private="hdr"`) cause an uncaught `TypeError` in the cache-control parser, terminating the request. ### Impact #### Shared-cache disclosure Applications using `interceptors.cache()` in shared mode may cache a user-specific response and serve it to a later caller with the same cache key. This can disclose private response bodies and headers, including `Set-Cookie`. Required conditions: - the cache interceptor is enabled in shared mode, including the default configuration; - an upstream returns a malformed directive such as `Cache-Control: public, max-age=300, private=""`; - another request later matches the same cache key, without a separating `Vary` header. #### Parse-time crash Applications using `interceptors.cache()` against an upstream that returns a `Cache-Control` header combining unqualified `private` with qualified `private="..."` see an uncaught `TypeError: output.private.concat is not a function` during response handling. The request rejects; depending on the consumer's error handling, the process may exit. ### Details `private=""` is parsed as `{ private: [''] }`. The shared-cache guard only rejects `private === true`, so the response can be stored. When served from cache, the previous user's body and headers may be returned to a different user. For the crash variant, an unqualified `private` directive sets `output.private = true`, then a subsequent qualified `private="hdr"` directive attempts `output.private.concat(['hdr'])`, which throws because boolean has no `concat` method. The patch routes the qualified-directive path through a shared helper that normalizes empty-after-trim arrays to `true` and preserves existing `true` values, closing both vectors. ### Patches Upgrade to `undici` 7.29.0 or 8.9.0. Both releases fix the qualified `private` directive handling that caused the shared-cache storage and the parser crash. ### Workarounds Until patched, avoid shared `interceptors.cache()` for user-specific responses, use `type: 'private'`, or disable caching for affected origins. ### Credit Disclosure variant reported by @h0rk1p via HackerOne report [#3817497](https://hackerone.com/reports/3817497).

Source published: 3 Aug 2026 19:19:47 UTC
Source modified: 10 Sep 2026 03:51:13 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:N/A:H

Publisher rating · HIGH