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CVE-2026-91164— Warpgate: API tokens bypass the user's allowed_ip_ranges restriction

Quick assessment

Affected
warp-tech warpgate
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.23.0 until 0.27.3, HTTP API token authentication resolves ConfigProvider::validate_api_token into RequestAuthorization::UserToken without enforcing the owning user's allowed_ip_rang

CVSS 4.3 · Medium EPSS 0.24% · P16
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I. Basic Information for CVE-2026-91164

Vulnerability Information

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Vulnerability Title
Warpgate: API tokens bypass the user's allowed_ip_ranges restriction
Source: CVE Program / CVE List V5
Vulnerability Description
Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.23.0 until 0.27.3, HTTP API token authentication resolves ConfigProvider::validate_api_token into RequestAuthorization::UserToken without enforcing the owning user's allowed_ip_ranges against the trusted client address in warpgate-protocol-http/src/common.rs. An attacker holding a leaked, phished, or exfiltrated X-Warpgate-Token can therefore use it from a prohibited network location. Deployments without allowed_ip_ranges are unaffected, and HTTP target proxying plus SSH, MySQL, PostgreSQL, RDP, VNC, and Kubernetes paths do not accept this vulnerable HTTP token flow. This issue is fixed in version 0.27.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
warp-tech warpgate >= 0.23.0, < 0.27.3 -

II. Public POCs for CVE-2026-91164

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III. Intelligence Information for CVE-2026-91164

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Patches & Fixes for CVE-2026-91164 (2)

Other References for CVE-2026-91164 (2)

Same Patch Batch · warp-tech · 2026-09-21 · 7 CVEs total

CVE-2026-58491 9.3 CRITICAL Warpgate: Reflected XSS in SSO return endpoint via attacker-controlled next parameter
CVE-2026-63330 7.7 HIGH Warpgate: Missing Admin Authorization on Live Recording Stream WebSocket Allows Any Authen
CVE-2026-91167 6.0 MEDIUM Warpgate: Missing authorization check on `PUT /users/:id/roles/:role_id` allows any admin
CVE-2026-91166 5.7 MEDIUM Warpgate: Web SSH stores a jump host's key against the target's address, so it validates a
CVE-2026-63329 4.9 MEDIUM Warpgate: x-warpgate-username Header Not Stripped from Client Requests Enables Identity Sp
CVE-2026-91165 2.4 LOW Warpgate: Markup injection in SSO form_post return page via unencoded redirect/error value

IV. Related Vulnerabilities

Same product: warpgate
Same vendor: warp-tech
Same weakness: CWE-284

V. Comments for CVE-2026-91164

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