{"id":"CVE-2026-91166","title":"Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux","summary":"Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.25.0 until 0.27.6, the browser SSH path in warpgate-web-ssh/src/manager.rs handles RCEvent::HostKeyUnknown without the presenting hop identity and instead pas…","severity":"medium","cvss":5.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N","cwe":["CWE-297","CWE-923"],"vendor":"warp-tech","product":"warpgate","affected":["warpgate >= 0.25.0, < 0.27.6"],"published":"2026-09-21","updated":"2026-09-24","sourceUpdated":"2026-09-24T23:19:21.613","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91166","references":[{"url":"https://github.com/warp-tech/warpgate/commit/fb66ff74f979c22054f4d348cc0d9065cc67e5d3","label":"security-advisories@github.com"},{"url":"https://github.com/warp-tech/warpgate/releases/tag/v0.27.6","label":"security-advisories@github.com"},{"url":"https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f","label":"security-advisories@github.com"},{"url":"https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-24T22:31:49.029825Z"},"epss":0.00278,"epssPercentile":0.17996,"ingestedAt":"2026-09-21T19:51:58.863Z","slug":"CVE-2026-91166","body":"## Overview\n\nWarpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.25.0 until 0.27.6, the browser SSH path in warpgate-web-ssh/src/manager.rs handles RCEvent::HostKeyUnknown without the presenting hop identity and instead passes ssh_options.host and ssh_options.port for the final target to KnownHosts::trust. In Prompt and AutoAccept modes, a jump host key can therefore be stored for the target address. A machine later presenting the jump host key at the target address can be accepted as the target, allowing interception of user traffic and a newly issued certificate when certificate authentication is used. The native SSH path is unaffected because it tracks each hop separately. This issue is fixed in version 0.27.6.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":31.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":210438,"id":"CVE-2026-91166","ts":1790290513746,"field":"exploit_available","old":"false","new":"true"}]}