CVE-2026-123874
Node.js is vulnerable to an HTTP/2 use-after-free via respondWithFile() stream reset during a pending write
A use-after-free in Node.js HTTP/2 lets an unauthenticated client corrupt server memory, over both TLS and cleartext, when the server serves files with respondWithFile() or respondWithFD(). A client can make the server free an Http2Stream while a write request that points to it is still queued on the socket; when that write completes, the code dereferences and makes a virtual call through the freed object. The only precondition is that the application serves a file with stream.respondWithFile() or stream.respondWithFD(), with default settings otherwise. This vulnerability affects Node.js 26.x (since 26.9.0) and 24.x (since 24.22.0).
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| node nodejs |
≥ 24.0.0; < 24.22.3 (affected, semver) ≥ 25.0.0; < 26.13.1 (affected, semver) Other versions: unaffected |
CNA: openjs |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.0 / 7.5 high |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: openjs |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://nodejs.org/en/blog/vulnerability/november-2026-security-releasesCNA: openjs · vendor-advisory
- https://cna.openjsf.org/security-advisories.htmlCNA: openjs
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