Resource exhaustion in Apache Traffic Server - CVE-2026-111810
Published: October 23, 2026
Vulnerability identifier: #VU157330
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-111810
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service through excessive diagnostic logging.
The vulnerability exists due to unthrottled diagnostic logging in Apache Traffic Server when stripping internal @ headers from requests. A remote attacker can send requests containing many such headers to generate one diagnostic log line per stripped header, amplifying log output and exhausting resources to cause a denial of service.
Affected software
Apache Traffic Server
How to mitigate CVE-2026-111810
Install security update from vendor's website.
Apache Traffic Server - addressed in versions 9.2.16, 10.1.5, 10.2.1