# CVE-2026-58162: Apache Traffic Server improper certificate validation in certifier plugin

Source: https://junglewise.ai/threats/cve-2026-58162-apache-traffic-server-improper-certificate-validation-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-2026-58162 · Severity: critical · CVSS 10 · Published 2026-07-29

Apache Traffic Server, a high-performance web proxy used to manage internet traffic, contains a critical flaw in its certificate generation plugin. An attacker can manipulate the system into generating fraudulent security certificates by providing malicious connection information. This could allow an attacker to impersonate legitimate websites, intercept sensitive data, or disrupt web services, potentially leading to a total loss of system integrity.

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

## Quick answers

**Is CVE-2026-58162 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-58162 being exploited in the wild.

**How severe is CVE-2026-58162?** Critical severity, with a CVSS score of 10, 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-2026-58162?** 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-2026-58162 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-58162?** 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

A vulnerability exists in the Apache Traffic Server 'certifier' plugin due to improper certificate validation (CWE-295). The plugin generates SSL/TLS certificates based on the Server Name Indication (SNI) provided by the client, which is attacker-controlled. A remote, unauthenticated attacker can exploit this by sending a crafted SNI during the TLS handshake, causing the server to generate and potentially serve unauthorized certificates. This can lead to man-in-the-middle attacks or service disruption. The issue is resolved in versions 9.2.15 and 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: advisory: Initial publication of CVE-2026-58162
- 2026-07-29: disclosed

## 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)