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CVE-2026-41242
protobufjs has an arbitrary code execution issue
Critical9.4EPSS 0.77%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
protobufjs compiles protobuf definitions into JavaScript (JS) functions. In versions prior to 8.0.1, 7.5.5, and 6.11.6, attackers can inject arbitrary code in the "type" fields of protobuf definitions, which will then execute during object decoding using that definition. Versions 8.0.1, 7.5.5, and 6.11.6 patch the issue.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Critical9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| redhat-SADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 4.0 | Critical9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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 |
- EPSS (exploitation in 30 days)
- 0.77% · top 44% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.4.
Weakness
Affected products
- affected >= 7.0.0, < 7.5.5
- affected >= 8.0.0-experimental, < 8.0.1
- affected < 6.11.6
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmprotobufjsGHSA-xq3m-2v4x-88gg (opens in a new tab)
References (15)
- https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-xq3m-2v4x-88gg (opens in a new tab)x_refsource_CONFIRM
- https://github.com/protobufjs/protobuf.js/commit/086916b4a52c9f73ce88956edbb38fc902e54bbf (opens in a new tab)x_refsource_MISC
- https://github.com/protobufjs/protobuf.js/commit/535df444ac060243722ac5d672db205e5c531d75 (opens in a new tab)x_refsource_MISC
- https://github.com/protobufjs/protobuf.js/commit/ff7b2afef8754837cc6dc64c864cd111ab477956 (opens in a new tab)x_refsource_MISC
- https://access.redhat.com/errata/RHSA-2026:21338 (opens in a new tab)x_refsource_MISCvendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:24977 (opens in a new tab)x_refsource_MISCvendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:26234 (opens in a new tab)x_refsource_MISCvendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:37275 (opens in a new tab)x_refsource_MISCvendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:62260 (opens in a new tab)x_refsource_MISCvendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-41242 (opens in a new tab)x_refsource_MISCvdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2459442 (opens in a new tab)x_refsource_MISCissue-trackingx_refsource_REDHAT
- https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.5.5 (opens in a new tab)x_refsource_MISC
- https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.0.1 (opens in a new tab)x_refsource_MISC
- https://github.com/protobufjs/protobuf.js/tree/v6.11.6 (opens in a new tab)x_refsource_MISC
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41242.json (opens in a new tab)x_refsource_MISCx_sadp-csaf-vex
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-xq3m-2v4x-88gg (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-41242)Record last updated .