CVE-2026-58157 Apache Traffic Server: Improper server-session reuse can expose data across client connections
Improper session reuse in Apache Traffic Server allows attackers to expose data across client connections, requiring an upgrade to secure the server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58157?
CVE-2026-58157 is a medium-severity 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 can reuse server sessions and tunnels improperly, exposing data across client connections.
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-200
Which versions are affected by CVE-2026-58157?
It affects 1 product.
Products include Apache Traffic Server.
How do I fix CVE-2026-58157?
Upgrade to a fixed version.
Is CVE-2026-58157 being exploited?
There is no known exploitation of CVE-2026-58157 in the wild and no public exploit code.
Other vulnerabilities in Apache Traffic Server
Sources
Also known as DEBIAN-CVE-2026-58157, GHSA-vc32-c93g-p2f6, UBUNTU-CVE-2026-58157.