Vulnerability · Published Nov 4, 2026 · Assigned by GitHub_M
CVE-2026-91163Warpgate: Kubernetes listener discloses internal error text to an unauthenticated caller
Low 3.7
In plain English
A low-severity sensitive data in logs in warpgate from warp-tech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Official description
Warpgate is an open source SSH, HTTPS, and MySQL bastion host for Linux. Prior to 0.29.0, the Kubernetes protocol listener uses AcceptAnyClientCert in warpgate-protocol-kubernetes/src/server/client_certs.rs to accept certificates at the TLS layer and defer validation to warpgate-protocol-kubernetes/src/server/auth.rs, where authentication and lookup failures are rendered verbatim in an HTTP 500 response body. The Kubernetes application in warpgate-protocol-kubernetes/src/server/mod.rs lacks the outer request-logging wrapper used by the HTTP protocol, and failures in warpgate-protocol-kubernetes/src/server/handlers.rs can short-circuit before its inner log point. An unauthenticated network client can therefore induce failures and receive ASN.1/DER parser diagnostics or sea_orm database errors without the attempt being recorded in the gateway log. The disclosed information is limited to internal diagnostics, and no user-data, integrity, or availability impact is established. This issue is fixed in version 0.29.0.
Affected products (as reported)
Weakness: CWE-209, CWE-532 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/warp-tech/warpgate/security/advisories/GHSA-hrfx-fm67-gv64 x_refsource_CONFIRM
- https://github.com/warp-tech/warpgate/pull/2547 x_refsource_MISC
- https://github.com/warp-tech/warpgate/commit/8426196a27c30fca521656653f9df1faf3df7523 x_refsource_MISC
- https://github.com/warp-tech/warpgate/releases/tag/v0.29.0 x_refsource_MISC