warp-tech Warpgate up to 0.25.4 SSO sso_provider_list.rs Next cross site scripting

Summaryinfo

A vulnerability was found in warp-tech Warpgate up to 0.25.4. It has been declared as problematic. This affects an unknown function of the file warpgate-protocol-http/src/api/sso_provider_list.rs of the component SSO. Such manipulation of the argument Next leads to cross site scripting. This vulnerability is listed as CVE-2026-58491. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in warp-tech Warpgate up to 0.25.4 and classified as problematic. Affected by this issue is some unknown processing of the file warpgate-protocol-http/src/api/sso_provider_list.rs of the component SSO. The manipulation of the argument next with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.25.5, the /@warpgate/api/sso/providers/:name/start endpoint stores an attacker-controlled next parameter that the POST /@warpgate/api/sso/return handler inserts without HTML escaping into the response generated by warpgate-protocol-http/src/api/sso_provider_list.rs. A victim who follows a crafted link and completes SSO can cause markup and JavaScript to execute in the authenticated Warpgate origin, allowing access to session data and actions through user APIs, and through administrator APIs only when the victim is an administrator. The GET /@warpgate/api/sso/return path also uses the same unvalidated value as a redirect destination, enabling an open redirect. This issue is fixed in version 0.25.5.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-58491 since 06/30/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 0.25.5 eliminates this vulnerability.

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Productinfo

Vendor

• warp-tech

Name

• Warpgate

Version

• 0.25.0
• 0.25.1
• 0.25.2
• 0.25.3
• 0.25.4

Website

• Product: https://github.com/warp-tech/warpgate/

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