What is CVE-2026-58164?

CVE-2026-58164 is a high-severity vulnerability in Apache Traffic Server, classified under Use After Free. CVSS score: 7.5/10. Published 2026-07-29.

How severe is CVE-2026-58164?

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

Use After Free in Apache Traffic Server

CVE-2026-58164

Apache Traffic Server has use-after-free and time-of-check/time-of-use errors in remap configuration handling. 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 recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

Vulnerability class: Use-After-Free

EPSS: 0.004 (32.6th percentile) — read the EPSS interpretation.

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.

Affected products

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

Weakness classification (CWE)

CWE-416 — Use After Free

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2026-58164?: CVE-2026-58164 is a high-severity vulnerability in Apache Traffic Server, classified under Use After Free. CVSS score: 7.5/10. Published 2026-07-29.
How severe is CVE-2026-58164?: High severity. CVSS v3 base score is 7.5 out of 10.