{"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"}}}}

{}

{"affected": [{"affectedData": [{"product": "warpgate", "vendor": "warp-tech", "versions": [{"status": "affected", "version": ">= 0.25.0, < 0.27.6"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-91166", "lastModified": "2026-09-21T19:17:15.383", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 0.5, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-21T19:17:15.383", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/warp-tech/warpgate/commit/fb66ff74f979c22054f4d348cc0d9065cc67e5d3"}, {"source": "security-advisories@github.com", "url": "https://github.com/warp-tech/warpgate/releases/tag/v0.27.6"}, {"source": "security-advisories@github.com", "url": "https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-297"}, {"lang": "en", "value": "CWE-923"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.25.0,0.27.6)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "warpgate", "source": "cna", "vendor": "warp-tech"}, "product": "warpgate", "vendor": "warp-tech"}], "created": "2026-09-21T20:45:17.538300+00:00", "updated": "2026-09-21T21:15:14.469544+00:00", "vendors": ["warp-tech", "warp-tech$PRODUCT$warpgate"]}