{
    "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": "2026-09-24T22:32:09.888Z"
    },
    "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"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-24T22:31:49.029825Z",
                                "id": "CVE-2026-91166",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-24T22:32:09.888Z"
                }
            }
        ]
    }
}