CVE-2026-84895

EUVD-2026-88543
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
MetaCNA
UNKNOWN
---
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
facebookproxygen
2026.4.6.0 ≤
𝑥
< 2026.9.28.0
CNA
References
https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083
https://www.facebook.com/security/advisories/cve-2026-84895