Warpgate: Kubernetes authorization correlation can be reused by a recreated same-name account

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-91168
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-04 16:17:54 UTC
Updated2026-11-09 17:17:34 UTC
DescriptionWarpgate is an open source SSH, HTTPS, and MySQL bastion host for Linux. From 0.21.0 until 0.29.0, the Kubernetes request correlator in warpgate-protocol-kubernetes/src/correlator.rs keys an authorized AdmittedTarget by username, target_name, and client IP rather than by the immutable user UUID, while KubernetesSessionHandle::close does not evict the entry. If an account is deleted and a different low-privilege account is created with the same username, the replacement account can successfully authenticate as that recreated username and reuse the predecessor's still-live correlation entry when requesting the same target from the same client IP before kubernetes.session_max_age expires. Current-request authentication still occurs, but the reused entry bypasses a fresh target authorization check and can cause Warpgate to proxy requests with Kubernetes target credentials that the replacement account is not authorized to use, exposing cluster resources or permitting unauthorized mutations. This issue is fixed in version 0.29.0.

Risk And Classification

Primary CVSS: v3.1 6.8 MEDIUM from [email protected]

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

EPSS: 0.002800000 probability, percentile 0.206700000 (date 2026-11-09)

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Warp-tech Warpgate affected >= 0.21.0, < 0.29.0 Not specified

References

ReferenceSourceLinkTags
github.com/warp-tech/warpgate/security/advisories/GHSA-pw7m-635x-pmx7 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/2f77f07b8335ff495068aa10d650d4b314b... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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