11 Nov 2026 19:56:40 UTC
Node.js is vulnerable to an HTTP/2 use-after-free via respondWithFile() stream reset during a pending write
cve-program · CVE-2026-123874 · Published
CVE-2026-123874
Node.js is vulnerable to an HTTP/2 use-after-free via respondWithFile() stream reset during a pending write
CVSS 3.0 7.5 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-123874
PublishedA 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).
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