---
id: CVE-2026-91163
title: >-
  Warpgate: Kubernetes listener discloses internal error text to an
  unauthenticated caller
summary: >-
  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 …
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-209
  - CWE-532
vendor: warp-tech
product: warpgate
affected:
  - warpgate < 0.29.0
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T15:19:15.511Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-91163'
references:
  - url: >-
      https://github.com/warp-tech/warpgate/security/advisories/GHSA-hrfx-fm67-gv64
    label: >-
      https://github.com/warp-tech/warpgate/security/advisories/GHSA-hrfx-fm67-gv64
  - url: 'https://github.com/warp-tech/warpgate/pull/2547'
    label: 'https://github.com/warp-tech/warpgate/pull/2547'
  - url: >-
      https://github.com/warp-tech/warpgate/commit/8426196a27c30fca521656653f9df1faf3df7523
    label: >-
      https://github.com/warp-tech/warpgate/commit/8426196a27c30fca521656653f9df1faf3df7523
  - url: 'https://github.com/warp-tech/warpgate/releases/tag/v0.29.0'
    label: 'https://github.com/warp-tech/warpgate/releases/tag/v0.29.0'
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.439Z'
epss: 0.00172
epssPercentile: 0.0662
---

## Overview

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

- `warpgate < 0.29.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.