What is CVE-2026-111810?

CVE-2026-111810 is a high-severity vulnerability in Apache Software Foundation Traffic Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-10-21.

How severe is CVE-2026-111810?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Apache Software Foundation Traffic Server

CVE-2026-111810

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.

Vulnerability class: DoS (Denial of Service)

Published 2026-10-21 · last modified 2026-10-22.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apache Software Foundation Traffic Server — versions 10.1.4, 10.2.0, 9.2.15

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc (vendor-advisory)

Frequently asked questions

What is CVE-2026-111810?: CVE-2026-111810 is a high-severity vulnerability in Apache Software Foundation Traffic Server, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-10-21.
How severe is CVE-2026-111810?: High severity. CVSS v3 base score is 7.5 out of 10.