CVE-2026-58163 Apache Traffic Server: Cache deserialization and lifetime errors can corrupt state or crash the server
Attackers can corrupt server state or cause crashes in Apache Traffic Server via mishandled on-disk cache fields and object lifetimes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58163?
CVE-2026-58163 is a high-severity unsafe deserialization 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 mishandles on-disk cache fields and object lifetimes, corrupting state or crashing.
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-502
Which versions are affected by CVE-2026-58163?
It affects 1 product.
Products include Apache Traffic Server.
How do I fix CVE-2026-58163?
Upgrade to a fixed version.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-58163 being exploited?
There is no known exploitation of CVE-2026-58163 in the wild and no public exploit code.
Other vulnerabilities in Apache Traffic Server
Sources
Also known as DEBIAN-CVE-2026-58163, GHSA-6mpw-4jp8-fpfw, UBUNTU-CVE-2026-58163.