# CVE-2026-58181: Apache Traffic Server stack exhaustion in uri_signing and url_sig plugins

Source: https://junglewise.ai/threats/cve-2026-58181-apache-traffic-server-stack-exhaustion-in-uri-signing-and-url-sig  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-29. Updated: 2026-07-29  
License: CC BY 4.0 with a link back

CVE-2026-58181 · Severity: high · CVSS 7.5 · Published 2026-07-29

Apache Traffic Server, a high-performance caching proxy used to speed up web content delivery, contains a vulnerability in its URL signing plugins. An attacker can send specially crafted requests that cause the server to crash or stop responding. This could lead to a service outage, preventing users from accessing websites or applications served through the proxy.

## Quick answers

**Is CVE-2026-58181 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58181 being exploited in the wild.

**How severe is CVE-2026-58181?** High severity, with a CVSS score of 7.5, published 29 July 2026.

**Which products and versions are affected?** Apache Traffic Server 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, 10.0.0 through 10.1.3.

**Is there a fix for CVE-2026-58181?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-58181 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-58181?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stack-based buffer overflow (CWE-121) exists in the uri_signing and url_sig plugins of Apache Traffic Server. The vulnerability is triggered by specific attacker-controlled input that leads to stack exhaustion or a process crash. This is a remote, unauthenticated attack vector that impacts service availability (Denial of Service). The issue affects versions 8.x, 9.x, and 10.x up to 10.1.3. Users are advised to upgrade to versions 9.2.15 or 10.1.4 to mitigate this risk.

## Affected products

- Apache Traffic Server 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, 10.0.0 through 10.1.3

## Timeline

- 2026-07-29: disclosed
- 2026-07-29: advisory

## References

- [https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d](https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d)