CVE-2026-91164

MEDIUM 4.3

Warpgate: API tokens bypass the user's allowed_ip_ranges restriction

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-284 CWE-863
Vendor	warp-tech
Product	warpgate
Published	Sep 21, 2026
Last Updated	Sep 21, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

warp-tech / warpgate

>= 0.23.0, < 0.27.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/warp-tech/warpgate/security/advisories/GHSA-qmr2-wp96-h9ff github.com: https://github.com/warp-tech/warpgate/pull/2356 github.com: https://github.com/warp-tech/warpgate/commit/8cb33a1a7c447ab0cde3a1ee9f95bf9dde905482 github.com: https://github.com/warp-tech/warpgate/releases/tag/v0.27.3