{"id":"CVE-2026-84894","published":"2026-09-28T19:16:50.213","lastModified":"2026-09-28T19:16:50.213","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://github.com/facebookexperimental/moxygen/commit/004123dd24c30dad6b649163575145f240dabc94","tags":[]},{"url":"https://www.facebook.com/security/advisories/cve-2026-84894","tags":[]}],"exploitRefs":[{"url":"https://github.com/facebookexperimental/moxygen/commit/004123dd24c30dad6b649163575145f240dabc94","tags":[]}],"hasPoc":true,"ai":null}