CVE-2026-84895

In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.

CVSS 3.1

7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-09-28

Modified

2026-10-01

Record from

the NVD, synced 2026-10-19

References

• https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083
• https://www.facebook.com/security/advisories/cve-2026-84895

Check your stackJSON