CVE-2026-119236

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-119236
StatePUBLISHED
AssignerMeta
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 17:17:16 UTC
Updated2026-11-11 17:17:16 UTC
DescriptionAn mvfst QUIC server retained CRYPTO frame data received at an encryption level (Initial or Handshake) that the TLS handshake had already moved past. Because the transport treated this data as delivered, it did not count against the CRYPTO stream buffer limit. A remote, unauthenticated client could complete a handshake, withhold its acknowledgment of the server's HANDSHAKE_DONE frame so that Handshake keys stay in use, and keep sending Handshake-level CRYPTO data at increasing offsets, causing unbounded memory growth on the server and leading to denial of service. This issue affects mvfst versions prior to v2026.11.09.00.

Risk And Classification

Problem Types: Allocation of Resources Without Limits or Throttling (CWE-770)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Facebook Mvfst affected v0.0.0.0 v2026.11.09.00 semver Not specified

References

ReferenceSourceLinkTags
github.com/meta/mvfst/commit/7e5cff58e8cbed87793141ceeca0a8a343c67c44 [email protected] github.com
www.facebook.com/security/advisories/cve-2026-119236 [email protected] www.facebook.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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