Apache Traffic Server up to 8.1.9/9.2.14/10.1.3 privileges management

Summaryinfo

A vulnerability was found in Apache Traffic Server up to 8.1.9/9.2.14/10.1.3. It has been rated as very critical. Affected is an unknown function. This manipulation causes privileges management. This vulnerability is tracked as CVE-2026-58156. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Apache Traffic Server up to 8.1.9/9.2.14/10.1.3 and classified as very critical. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, 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.

The advisory is shared at lists.apache.org. This vulnerability is known as CVE-2026-58156 since 06/29/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/30/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 9.2.15 or 10.1.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-50185) and CERT Bund (WID-SEC-2026-2561). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Apache Traffic Server

Productinfo

Vendor

• Apache

Name

• Traffic Server

Version

• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.1.4
• 8.1.5
• 8.1.6
• 8.1.7
• 8.1.8
• 8.1.9
• 9.2.0
• 9.2.1
• 9.2.2
• 9.2.3
• 9.2.4
• 9.2.5
• 9.2.6
• 9.2.7
• 9.2.8
• 9.2.9
• 9.2.10
• 9.2.11
• 9.2.12
• 9.2.13
• 9.2.14
• 10.1.0
• 10.1.1
• 10.1.2
• 10.1.3

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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