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CVE-2026-44293

protobufjs: Code injection through bytes field defaults in generated toObject code

CVSS 4.0 7.7 HIGHEUVD CVSS 4.0 7.7 CVSS 4.0 · [email protected] · Secondary 7.7 HIGHCVSS 3.1 · [email protected] · Primary 8.8 HIGHCVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary 7.1 HIGHCVSS_V4 Publisher rating HIGHFixed by protobufjs 7.5.6Fixed by protobufjs 8.0.2KEV status unknown
Original advisory

cve-program · CVE-2026-44293

Published

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

Read the publisher's advisory

euvd · EUVD-2026-30031

Published

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

Read the publisher's advisory

nvd · CVE-2026-44293

Published

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

Read the publisher's advisory

osv · GHSA-66ff-xgx4-vchm

Published

## Summary protobufjs generated JavaScript for `toObject` conversion could include an unsafe expression derived from a schema-controlled `bytes` field default value. A crafted descriptor with a non-string default value for a `bytes` field could cause attacker-controlled code to be emitted into the generated conversion function. ## Impact An attacker who can provide or influence a protobuf descriptor may be able to execute arbitrary JavaScript in the context of the process using protobufjs. This requires the application to load an attacker-controlled schema or descriptor and then convert a message of the affected type with defaults enabled. Applications that only use trusted, application-defined schemas are not directly affected by this issue. ## Preconditions - The application must allow an attacker to control or influence a protobuf JSON descriptor or equivalent reflected schema. - The descriptor must define a `bytes` field with an attacker-controlled default value. - The application must call `toObject` with defaults enabled for the affected type. ## Workarounds Do not load protobuf schemas or JSON descriptors from untrusted sources with affected versions. If untrusted schemas must be accepted, validate or restrict field options before loading them and run schema processing in an isolated environment.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-44293

Published

protobuf.js

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "protobufjs",
                    "product": "protobuf.js",
                    "versions": [
                        {
                            "version": "< 7.5.6",
                            "status": "affected"
                        },
                        {
                            "version": ">= 8.0.0, < 8.0.2",
                            "status": "affected"
                        }
                    ]
                }

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

euvd · EUVD-2026-30031

Published

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 13, 2026, 2:43:33 PM

dateUpdated: Sep 9, 2026, 12:05:01 PM

10 related source bulletins · separate from aliases

RHSA-2026:37628: Red Hat Security Advisory: OpenShift Container Platform 4.20.29 bug fix and security update

CVE-2026-6322 · CVE-2026-9595 · CVE-2026-13676 · CVE-2026-44293

RHSA-2026:26234: Red Hat Security Advisory: Red Hat Developer Hub 1.9.5 release.

CVE-2026-6321 · CVE-2026-6322 · CVE-2026-24781 · CVE-2026-32281 · CVE-2026-41242 · CVE-2026-41672 · CVE-2026-41673 · CVE-2026-41674 · CVE-2026-41675 · CVE-2026-44293

RHSA-2026:60520: Red Hat Security Advisory: RHOAI 3.4.4 - Red Hat OpenShift AI

CVE-2025-66471 · CVE-2025-66626 · CVE-2025-71329 · CVE-2025-71330 · CVE-2026-0545 · CVE-2026-2614 · CVE-2026-5241 · CVE-2026-5422 · CVE-2026-6322 · CVE-2026-6734 · CVE-2026-8643 · CVE-2026-9697 · CVE-2026-12143 · CVE-2026-12151 · CVE-2026-12243 · CVE-2026-12481 · CVE-2026-13149 · CVE-2026-13311 · CVE-2026-13676 · CVE-2026-13717 · CVE-2026-14450 · CVE-2026-15154 · CVE-2026-15218 · CVE-2026-15378 · CVE-2026-15467 · CVE-2026-15581 · CVE-2026-16745 · CVE-2026-18608 · CVE-2026-18611 · CVE-2026-18617 · CVE-2026-18620 · CVE-2026-18621 · CVE-2026-18948 · CVE-2026-18951 · CVE-2026-18982 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-32280 · CVE-2026-32283 · CVE-2026-33079 · CVE-2026-33245 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-34993 · CVE-2026-35397 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39835 · CVE-2026-40171 · CVE-2026-41672 · CVE-2026-41673 · CVE-2026-41675 · CVE-2026-42211 · CVE-2026-42215 · CVE-2026-42264 · CVE-2026-42266 · CVE-2026-42284 · CVE-2026-42305 · CVE-2026-42311 · CVE-2026-42338 · CVE-2026-42342 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-42508 · CVE-2026-42557 · CVE-2026-44017 · CVE-2026-44018 · CVE-2026-44020 · CVE-2026-44240 · CVE-2026-44244 · CVE-2026-44289 · CVE-2026-44290 · CVE-2026-44291 · CVE-2026-44292 · CVE-2026-44293 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44513 · CVE-2026-44660 · CVE-2026-44705 · CVE-2026-44724 · CVE-2026-44727 · CVE-2026-44827 · CVE-2026-44843 · CVE-2026-45292 · CVE-2026-45623 · CVE-2026-45736 · CVE-2026-45740 · CVE-2026-45804 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-46625 · CVE-2026-47214 · CVE-2026-48526 · CVE-2026-48710 · CVE-2026-48712 · CVE-2026-48779 · CVE-2026-48801 · CVE-2026-49476 · CVE-2026-49477 · CVE-2026-49851 · CVE-2026-49978 · CVE-2026-50193 · CVE-2026-53550 · CVE-2026-54058 · CVE-2026-54060 · CVE-2026-54283 · CVE-2026-54293 · CVE-2026-55379 · CVE-2026-55380 · CVE-2026-55685 · CVE-2026-56121 · CVE-2026-56208 · CVE-2026-56209 · CVE-2026-56210 · CVE-2026-56211 · CVE-2026-58049 · CVE-2026-59197 · CVE-2026-59199 · CVE-2026-59200 · CVE-2026-59204 · CVE-2026-59205 · CVE-2026-59869 · CVE-2026-59873 · CVE-2026-59874 · CVE-2026-59884 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-64835 · CVE-2026-64849 · CVE-2026-69152 · CVE-2026-69192 · CVE-2026-69243 · CVE-2026-69244

RHSA-2026:34374: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update

CVE-2026-6322 · CVE-2026-8643 · CVE-2026-33154 · CVE-2026-42338 · CVE-2026-44188 · CVE-2026-44293 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44495 · CVE-2026-45736 · CVE-2026-48526

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-2026:37186: Red Hat Security Advisory: OpenShift Container Platform 4.21.24 bug fix and security update

CVE-2026-4800 · CVE-2026-6322 · CVE-2026-9595 · CVE-2026-13676 · CVE-2026-44293

RHSA-2026:54555: Red Hat Security Advisory: OpenShift Container Platform 4.19.43 bug fix and security update

CVE-2026-6322 · CVE-2026-39820 · CVE-2026-42499 · CVE-2026-44293 · CVE-2026-44488 · CVE-2026-44495 · CVE-2026-50236 · CVE-2026-50237

RHSA-2026:34160: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

CVE-2026-6322 · CVE-2026-33154 · CVE-2026-41240 · CVE-2026-42035 · CVE-2026-42784 · CVE-2026-44293 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44488 · CVE-2026-44495 · CVE-2026-48526

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-2026:37385: Red Hat Security Advisory: rh-podman-desktop security advisory update

CVE-2026-6321 · CVE-2026-6322 · CVE-2026-44293

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

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

nvd · CVE-2026-44293

Published

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: Modified

Weakness classifications: CWE-94

Original publisher date fields

published: 2026-05-13T16:16:56.253

lastModified: 2026-11-11T20:10:00.273

1 source CPE criteria · context only
  • cpe:2.3:a:protobufjs_project:protobufjs:*:*:*:*:*:node.js:*:*

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

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

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

osv · GHSA-66ff-xgx4-vchm

Published

protobufjs

npm

SEMVER · introduced 0 → fixed 7.5.6

protobufjs

npm

SEMVER · introduced 8.0.0 → fixed 8.0.2

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

ChangeIntel

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