CVE-2026-91095

MEDIUMCVSS 5.3

Description

In proxygen from v2024.10.28.00 until v2026.09.28.00, the HTTPTransaction::onWebTransportUniStream and HTTPTransaction::onWebTransportBidiStream APIs could return stream handles that the stream handler had already freed. HQSession then installed those handles as transport read callbacks, which could lead to use of freed memory.

Timeline

Published:September 28th, 2026 9:17 PM

Last modified:September 30th, 2026 8:17 PM

CVSS Scoring

CVSS v3: 5.3 (MEDIUM)

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

Weaknesses (CWE)

CWE-416

References & Reports

Advisories, patches, and third-party reports

https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083
https://www.facebook.com/security/advisories/cve-2026-91095

Source: NIST NVD · Data may lag official sources by up to one minute