Vulnerability · Published Sep 21, 2026 · Assigned by GitHub_M

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

Medium 4.3

In plain English

A medium-severity improper access control in warpgate from warp-tech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 63.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

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

Weakness: CWE-284, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

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