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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-91163
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 16:17:54 UTC
Updated2026-11-09 17:17:33 UTC
DescriptionWarpgate 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

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

EPSS: 0.001720000 probability, percentile 0.066130000 (date 2026-11-09)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Warp-tech Warpgate affected < 0.29.0 Not specified

References

ReferenceSourceLinkTags
github.com/warp-tech/warpgate/security/advisories/GHSA-hrfx-fm67-gv64 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/warp-tech/warpgate/releases/tag/v0.29.0 [email protected] github.com
github.com/warp-tech/warpgate/commit/8426196a27c30fca521656653f9df1faf3d... [email protected] github.com
github.com/warp-tech/warpgate/pull/2547 [email protected] github.com
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