{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-102893",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-29T17:34:42.743Z",
        "datePublished": "2026-10-14T15:49:03.442Z",
        "dateUpdated": "2026-10-15T19:06:20.918Z"
    },
    "containers": {
        "cna": {
            "title": "Zulip: OpenID Connect authentication ignores the email_verified claim",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "lang": "en",
                            "description": "CWE-287: Improper Authentication",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 9.1,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/zulip/zulip/security/advisories/GHSA-xw9h-9rcm-hx4m",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/zulip/zulip/security/advisories/GHSA-xw9h-9rcm-hx4m"
                },
                {
                    "name": "https://github.com/zulip/zulip/pull/39913",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zulip/zulip/pull/39913"
                },
                {
                    "name": "https://github.com/zulip/zulip/commit/68d2d9defa39f8af96a50fc7430efc34dee120b5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zulip/zulip/commit/68d2d9defa39f8af96a50fc7430efc34dee120b5"
                },
                {
                    "name": "https://github.com/zulip/zulip/commit/b40f191a8c71e74fcb471f71de6a1233de157102",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zulip/zulip/commit/b40f191a8c71e74fcb471f71de6a1233de157102"
                },
                {
                    "name": "https://github.com/zulip/zulip/releases/tag/12.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/zulip/zulip/releases/tag/12.2"
                }
            ],
            "affected": [
                {
                    "vendor": "zulip",
                    "product": "zulip",
                    "versions": [
                        {
                            "version": "< 12.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-14T15:49:03.442Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, GenericOpenIdConnectBackend matches the identity provider email claim to an active account's delivery_email without rejecting an explicitly false email_verified claim. If a configured identity provider returns an email address that the authenticating user does not control together with email_verified=false, Zulip can log the user into the existing account for that address. Exploitation requires a misconfigured trusted identity provider, and deployments whose authoritative identity provider only emits email addresses controlled by the authenticating user are not affected. This issue is fixed in version 12.2."
                }
            ],
            "source": {
                "advisory": "GHSA-xw9h-9rcm-hx4m",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-15T19:05:46.384884Z",
                                "id": "CVE-2026-102893",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-10-15T19:06:20.918Z"
                }
            }
        ]
    }
}