CVE-2026-91163 PUBLISHED

Warpgate: Kubernetes listener discloses internal error text to an unauthenticated caller

Assigner: GitHub_M
Reserved: 14.09.2026 Published: 04.11.2026 Updated: 04.11.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS Score: 3.7

Product Status

Vendor warp-tech
Product warpgate
Versions
  • Version < 0.29.0 is affected

References

Problem Types

  • CWE-209: Generation of Error Message Containing Sensitive Information CWE
  • CWE-532: Insertion of Sensitive Information into Log File CWE