{"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": "2026-10-14T15:49:03.442Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "zulip", "vendor": "zulip", "versions": [{"status": "affected", "version": "< 12.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-102893", "lastModified": "2026-10-14T16:17:29.987", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-14T16:17:29.987", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/zulip/zulip/commit/68d2d9defa39f8af96a50fc7430efc34dee120b5"}, {"source": "security-advisories@github.com", "url": "https://github.com/zulip/zulip/commit/b40f191a8c71e74fcb471f71de6a1233de157102"}, {"source": "security-advisories@github.com", "url": "https://github.com/zulip/zulip/pull/39913"}, {"source": "security-advisories@github.com", "url": "https://github.com/zulip/zulip/releases/tag/12.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/zulip/zulip/security/advisories/GHSA-xw9h-9rcm-hx4m"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}