What is CVE-2026-58159?

CVE-2026-58159 is a high-severity vulnerability in Apache Software Foundation Traffic Server, classified under Incorrect Authorization. CVSS score: 8.2/10. Published 2026-07-29.

How severe is CVE-2026-58159?

High severity. CVSS v3 base score is 8.2 out of 10.

Auth bypass in Apache Software Foundation Traffic Server

CVE-2026-58159

Apache Traffic Server can bypass IP access controls on UDS listeners and through ACL matching errors. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are re…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.

Affected products

Apache Software Foundation Traffic Server — versions 8.0.0, 9.0.0, 10.0.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security@apache.org (vendor-advisory)

Frequently asked questions

What is CVE-2026-58159?: CVE-2026-58159 is a high-severity vulnerability in Apache Software Foundation Traffic Server, classified under Incorrect Authorization. CVSS score: 8.2/10. Published 2026-07-29.
How severe is CVE-2026-58159?: High severity. CVSS v3 base score is 8.2 out of 10.