Vulnerability Description
Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.23.0 until 0.27.3, HTTP API token authentication resolves ConfigProvider::validate_api_token into RequestAuthorization::UserToken without enforcing the owning user's allowed_ip_ranges against the trusted client address in warpgate-protocol-http/src/common.rs. An attacker holding a leaked, phished, or exfiltrated X-Warpgate-Token can therefore use it from a prohibited network location. Deployments without allowed_ip_ranges are unaffected, and HTTP target proxying plus SSH, MySQL, PostgreSQL, RDP, VNC, and Kubernetes paths do not accept this vulnerable HTTP token flow. This issue is fixed in version 0.27.3.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/warp-tech/warpgate/commit/8cb33a1a7c447ab0cde3a1ee9f95bf9dde9
- https://github.com/warp-tech/warpgate/pull/2356
- https://github.com/warp-tech/warpgate/releases/tag/v0.27.3
- https://github.com/warp-tech/warpgate/security/advisories/GHSA-qmr2-wp96-h9ff
FAQ
What is CVE-2026-91164?
CVE-2026-91164 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.23.0 until 0.27.3, HTTP API token authentication resolves ConfigProvider::validate_api_token into RequestAuthorization::U...
How severe is CVE-2026-91164?
CVE-2026-91164 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-91164?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.