Improper Certificate Validation in Apache Traffic Server - CVE-2026-65325
Published: August 24, 2026
Vulnerability identifier: #VU144902
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-65325
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass certificate hostname validation.
The vulnerability exists due to improper certificate validation in HTTP/2 multiplexed origin session reuse when reusing origin connections for a new request hostname. A remote attacker can trigger reuse of an existing connection to bypass certificate hostname validation.
Affected software
Apache Traffic Server
Fedora
trafficserver
Fedora
trafficserver
How to mitigate CVE-2026-65325
Install security update from vendor's website.
Apache Traffic Server - addressed in versions 9.2.15, 10.1.4
trafficserver - addressed in versions 9.2.15-1.el8, 9.2.15-1.el9, 10.1.4-1.fc43, 10.1.4-1.fc44
trafficserver - addressed in versions 9.2.15-1.el8, 9.2.15-1.el9, 10.1.4-1.fc43, 10.1.4-1.fc44