CVE-2026-91096

In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister read callbacks for streams that were no longer open before destroying them. The transport could then invoke a read callback that had been freed.

Score

CVSS 3.1 7.5 High

Status

Deferred - cve-assign@fb.com

Published

2026-09-28

Last modified

2026-09-30

Weaknesses

CWE-416

Affected products

• Proxygen (Facebook)

References

• https://www.facebook.com/security/advisories/cve-2026-91096
• https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083