[ CVE-2026-84894 · Published 28 Sep 2026 ]
Vulnerability in Meta Platforms, Inc moxygen
CVSS 7.5
EPSS <1%No fix listed yet
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.