CVE-2026-84894

HighCVSS 7.5/10Last modified Sep 30, 2026

Description

In moxygen before commit 004123dd24c3, MoQSession::dataStreamReadLoop keeps using a stream read handle after reading a FIN, which invalidates the handle under proxygen's WebTransport API. A remote peer can trigger the stale use by opening a data stream that names an unknown track alias and carries the FIN in the same write.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
Meta Platforms, Incmoxygen>= b24f8e65cb83ebe5f3880cc4e3a4c8f64e1882f9, < 004123dd24c30dad6b649163575145f240dabc94

References

Timeline

Published
Sep 28, 2026
Last modified
Sep 30, 2026
NVD status
Deferred

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