{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91166", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-14T21:20:41.196Z", "datePublished": "2026-09-21T18:53:56.224Z", "dateUpdated": "2026-09-21T18:53:56.224Z"}, "containers": {"cna": {"title": "Warpgate: Web SSH stores a jump host's key against the target's address, so it validates as the target", "problemTypes": [{"descriptions": [{"cweId": "CWE-297", "lang": "en", "description": "CWE-297: Improper Validation of Certificate with Host Mismatch", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-923", "lang": "en", "description": "CWE-923: Improper Restriction of Communication Channel to Intended Endpoints", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f"}, {"name": "https://github.com/warp-tech/warpgate/commit/fb66ff74f979c22054f4d348cc0d9065cc67e5d3", "tags": ["x_refsource_MISC"], "url": "https://github.com/warp-tech/warpgate/commit/fb66ff74f979c22054f4d348cc0d9065cc67e5d3"}, {"name": "https://github.com/warp-tech/warpgate/releases/tag/v0.27.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/warp-tech/warpgate/releases/tag/v0.27.6"}], "affected": [{"vendor": "warp-tech", "product": "warpgate", "versions": [{"version": ">= 0.25.0, < 0.27.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-21T18:53:56.224Z"}, "descriptions": [{"lang": "en", "value": "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 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."}], "source": {"advisory": "GHSA-w9jj-vpw3-5r8f", "discovery": "UNKNOWN"}}}}