# CVE-2026-58188: Apache Traffic Server memory safety and limit bypass in experimental plugins

Source: https://junglewise.ai/threats/cve-2026-58188-apache-traffic-server-memory-safety-and-limit-bypass-in  
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-2026-58188 · Severity: high · CVSS 8.2 · Published 2026-07-29

Apache Traffic Server, a high-performance caching proxy used to manage web traffic, contains vulnerabilities in several of its experimental plugins. These flaws could allow an attacker to bypass security limits or cause the system to crash, potentially leading to service outages. Organizations using these specific plugins should update to the latest patched versions to ensure service availability and security.

Technologies: [Apache Traffic Server](https://junglewise.ai/threats/technologies/traffic-server). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-58188 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58188 being exploited in the wild.

**How severe is CVE-2026-58188?** High severity, with a CVSS score of 8.2, published 29 July 2026.

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

**Is there a fix for CVE-2026-58188?** 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-2026-58188 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-58188?** Check whether you run Apache Traffic Server at an affected version. 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

Apache Traffic Server experimental plugins are affected by memory-safety issues, specifically identified as out-of-bounds writes (CWE-787), and limit-bypass errors. These vulnerabilities can be triggered remotely over the network without authentication. Successful exploitation could lead to a denial-of-service (DoS) condition or allow an attacker to circumvent configured traffic limits. The issue impacts versions 8.x, 9.x, and 10.x; users are advised to upgrade to versions 9.2.15 or 10.1.4.

## Affected products

- Apache Traffic Server 8.0.0 to 8.1.9, 9.0.0 to 9.2.14, 10.0.0 to 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)

## Related threats

- [Apache Traffic Server null pointer dereference in request tear-down](https://junglewise.ai/threats/cve-2026-112381-apache-traffic-server-can-crash-with-a-null-pointer-dereference)
- [Apache Traffic Server connection stall with chunked transfer trailers dropped](https://junglewise.ai/threats/cve-2026-111817-apache-traffic-server-can-stall-a-chunked-transfer-that-it)
- [Apache Traffic Server TLS session resumption bypass of client certificate verification](https://junglewise.ai/threats/cve-2026-111815-apache-traffic-server-can-resume-a-tls-session-across-sni)
- [Apache Traffic Server TLS session reuse with mismatched client certificates](https://junglewise.ai/threats/cve-2026-111814-apache-traffic-server-s-default-outbound-session-sharing-policy)
- [Apache Traffic Server origin_server_auth AWS request signing bypass](https://junglewise.ai/threats/cve-2026-111812-apache-traffic-server-s-origin-server-auth-plugin-lets-a-client)