CVE-2026-58164 Apache Traffic Server: Remap configuration lifetime and TOCTOU errors cause use-after-free

What is CVE-2026-58164?

CVE-2026-58164 is a high-severity use after free vulnerability in Apache Traffic Server, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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 8.1.11, 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.

Weakness: CWE-416

Which versions are affected by CVE-2026-58164?

It affects 1 product.

Products include Apache Traffic Server.

How do I fix CVE-2026-58164?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-58164 being exploited?

There is no known exploitation of CVE-2026-58164 in the wild and no public exploit code.

Other vulnerabilities in Apache Traffic Server

• CVE-2014-3525 Other in n/a Critical 10.0
• CVE-2021-43082 heap-buffer-overflow with stats-over-http plugin Critical 9.8
• CVE-2021-35474 Dynamic stack buffer overflow in cachekey plugin Critical 9.8
• CVE-2019-17559 Other in Apache Traffic Server Critical 9.8
• CVE-2019-17565 Other in Apache Traffic Server Critical 9.8

All Apache Traffic Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-58164, GHSA-wf7j-7jm8-xrmj, UBUNTU-CVE-2026-58164.