# CVE-2026-91168: Warpgate: Kubernetes authorization correlation can be reused by a recreated same-name account

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

Warpgate 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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- warp-tech / warpgate: >= 0.21.0, < 0.29.0 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 6.8 (medium); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N; source: CNA: GitHub_M

- CVSS 3.1: 6.8 (medium); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/warp-tech/warpgate/security/advisories/GHSA-pw7m-635x-pmx7 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/warp-tech/warpgate/commit/2f77f07b8335ff495068aa10d650d4b314bf4cc8 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/warp-tech/warpgate/releases/tag/v0.29.0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/warp-tech/warpgate/commit/2f77f07b8335ff495068aa10d650d4b314bf4cc8 (security-advisories@github.com)

- https://github.com/warp-tech/warpgate/releases/tag/v0.29.0 (security-advisories@github.com)

- https://github.com/warp-tech/warpgate/security/advisories/GHSA-pw7m-635x-pmx7 (security-advisories@github.com)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-91168; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-91168; retrieved 2026-11-04; source updated 2026-11-04

Revision: 522c0b7ebb50e6662589e55edf948b7c04f5df865155e24d89b965888a0be04a

Canonical: https://y2.dev/cve/CVE-2026-91168

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