Improper control of a resource through its lifetime in Apache Traffic Server - CVE-2026-65100
Published: August 24, 2026
Vulnerability identifier: #VU144901
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-65100
CWE-ID: CWE-664
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to corrupt subsequent HTTP/2 header processing.
The vulnerability exists due to improper state management in the HTTP/2 HPACK encoder when handling a failed header encode. A remote attacker can trigger an encode failure to corrupt subsequent HTTP/2 header processing.
The issue leaves the encoder out of sync with the peer decoder on the connection.
Affected software
Apache Traffic Server
Fedora
trafficserver
Fedora
trafficserver
How to mitigate CVE-2026-65100
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