CVE-2026-58189 Apache Traffic Server: Plugins resetting the redirect counter enable SSRF amplification
Attackers can bypass redirect limits via plugins to cause SSRF amplification in Apache Traffic Server, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-58189?
CVE-2026-58189 is a high-severity server-side request forgery 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 allows redirect-limit bypass when plugins reset the retry counter, enabling SSRF amplification.
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-918
Which versions are affected by CVE-2026-58189?
It affects 1 product.
Products include Apache Traffic Server.
How do I fix CVE-2026-58189?
Upgrade to a fixed version.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-58189 being exploited?
There is no known exploitation of CVE-2026-58189 in the wild and no public exploit code.
Other vulnerabilities in Apache Traffic Server
Sources
Also known as DEBIAN-CVE-2026-58189, GHSA-f54r-392m-jmr7, UBUNTU-CVE-2026-58189.