CVE-2026-111810 Apache Traffic Server: Unthrottled per-header diagnostic logging enables a log-flood denial of service
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-111810?
CVE-2026-111810 is a high-severity vulnerability in Apache Traffic Server, published on 21 Oct 2026.
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.
Weakness: CWE-400
Which versions are affected by CVE-2026-111810?
How do I fix CVE-2026-111810?
No fix has been published for CVE-2026-111810 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111810 being exploited?
There is no known exploitation of CVE-2026-111810 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-111810, GHSA-fx98-vw52-fjmw, UBUNTU-CVE-2026-111810.