CVE Catalog

CVE-2026-84894

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

15th percentile - higher than 15% of all known CVEs

Summary

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.

Risk Assessment

This can lead to a use-after-free condition, potentially causing a crash or code execution by a remote attacker. The vulnerability affects applications using moxygen with WebTransport.

Recommendation

Update moxygen to commit 004123dd24c3 or later. Until the update, consider restricting access to WebTransport functionality.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS