Vulnerability · Published Oct 21, 2026 · Assigned by apache

CVE-2026-111810Apache Traffic Server: Unthrottled per-header diagnostic logging enables a log-flood denial of service

High 7.5

In plain English

A high-severity uncontrolled resource consumption in Apache Traffic Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 70.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Apache Traffic Server 9.2.15, 10.1.4 and 10.2.0 write one unthrottled diagnostic log line for every internal @ header they strip, so a request carrying many such headers makes the proxy write far more log data than the request contains. This issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	trafficserver	no fix listed	DEBIAN-CVE-2026-111810
Ubuntu:24.04:LTS	trafficserver	no fix listed	UBUNTU-CVE-2026-111810

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache Traffic Server	9.2.1510.1.410.2.0

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc vendor-advisory