CVE-2026-66853

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66853", "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2", "state": "PUBLISHED", "assignerShortName": "Gitea", "dateReserved": "2026-08-13T16:50:59.743Z", "datePublished": "2026-10-14T14:36:01.009Z", "dateUpdated": "2026-10-14T15:17:24.381Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2", "shortName": "Gitea", "dateUpdated": "2026-10-14T14:36:01.009Z"}, "title": "Gitea restricted-user organization metadata disclosure", "descriptions": [{"lang": "en", "value": "Gitea's user organization-list API includes Limited-visibility organizations for authenticated restricted accounts without applying the visibility restriction enforced by the single-organization endpoint. A restricted user can list a known user's public organization memberships and retrieve limited organizations' names, descriptions, and avatars. This exposes organization metadata that should be hidden from the requesting account."}], "affected": [{"vendor": "Gitea", "product": "Gitea", "packageName": "code.gitea.io/gitea", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "1.27.2", "versionType": "semver"}]}], "references": [{"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-w4wc-g858-3672", "name": "GitHub Security Advisory GHSA-w4wc-g858-3672", "tags": ["vendor-advisory"]}, {"url": "https://blog.gitea.com/release-of-1.27.3/", "name": "Gitea 1.27.3 release announcement", "tags": ["release-notes"]}, {"url": "https://github.com/go-gitea/gitea/pull/39047", "name": "Fix: go-gitea/gitea pull request #39047", "tags": ["patch"]}, {"url": "https://github.com/go-gitea/gitea/pull/39058", "name": "Fix: go-gitea/gitea pull request #39058", "tags": ["patch"]}, {"url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3", "name": "go-gitea/gitea v1.27.3 release", "tags": ["release-notes"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor"}, {"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "credits": [{"lang": "en", "value": "https://github.com/Black1hp", "type": "reporter"}, {"lang": "en", "value": "https://github.com/Mon3mRT", "type": "finder"}, {"lang": "en", "value": "https://github.com/bircni", "type": "remediation developer"}]}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-10-14T15:17:20.621835Z", "id": "CVE-2026-66853", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-14T15:17:24.381Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-66853", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-14T15:17:20.621835Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-14T15:17:17.449Z"}}], "cna": {"title": "Gitea restricted-user organization metadata disclosure", "credits": [{"lang": "en", "type": "reporter", "value": "https://github.com/Black1hp"}, {"lang": "en", "type": "finder", "value": "https://github.com/Mon3mRT"}, {"lang": "en", "type": "remediation developer", "value": "https://github.com/bircni"}], "affected": [{"vendor": "Gitea", "product": "Gitea", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "1.27.2"}], "packageName": "code.gitea.io/gitea", "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-w4wc-g858-3672", "name": "GitHub Security Advisory GHSA-w4wc-g858-3672", "tags": ["vendor-advisory"]}, {"url": "https://blog.gitea.com/release-of-1.27.3/", "name": "Gitea 1.27.3 release announcement", "tags": ["release-notes"]}, {"url": "https://github.com/go-gitea/gitea/pull/39047", "name": "Fix: go-gitea/gitea pull request #39047", "tags": ["patch"]}, {"url": "https://github.com/go-gitea/gitea/pull/39058", "name": "Fix: go-gitea/gitea pull request #39058", "tags": ["patch"]}, {"url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3", "name": "go-gitea/gitea v1.27.3 release", "tags": ["release-notes"]}], "descriptions": [{"lang": "en", "value": "Gitea's user organization-list API includes Limited-visibility organizations for authenticated restricted accounts without applying the visibility restriction enforced by the single-organization endpoint. A restricted user can list a known user's public organization memberships and retrieve limited organizations' names, descriptions, and avatars. This exposes organization metadata that should be hidden from the requesting account."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor"}, {"lang": "en", "type": "CWE", "cweId": "CWE-863", "description": "CWE-863: Incorrect Authorization"}]}], "providerMetadata": {"orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2", "shortName": "Gitea", "dateUpdated": "2026-10-14T14:36:01.009Z"}}}, "cveMetadata": {"cveId": "CVE-2026-66853", "state": "PUBLISHED", "dateUpdated": "2026-10-14T15:17:24.381Z", "dateReserved": "2026-08-13T16:50:59.743Z", "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2", "datePublished": "2026-10-14T14:36:01.009Z", "assignerShortName": "Gitea"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "code.gitea.io/gitea", "product": "Gitea", "vendor": "Gitea", "versions": [{"lessThanOrEqual": "1.27.2", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Gitea's user organization-list API includes Limited-visibility organizations for authenticated restricted accounts without applying the visibility restriction enforced by the single-organization endpoint. A restricted user can list a known user's public organization memberships and retrieve limited organizations' names, descriptions, and avatars. This exposes organization metadata that should be hidden from the requesting account."}], "id": "CVE-2026-66853", "lastModified": "2026-10-14T16:17:50.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66853", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-14T15:17:20.621835Z", "version": "2.0.3"}}]}, "published": "2026-10-14T15:17:21.653", "references": [{"source": "88ee5874-cf24-4952-aea0-31affedb7ff2", "url": "https://blog.gitea.com/release-of-1.27.3/"}, {"source": "88ee5874-cf24-4952-aea0-31affedb7ff2", "url": "https://github.com/go-gitea/gitea/pull/39047"}, {"source": "88ee5874-cf24-4952-aea0-31affedb7ff2", "url": "https://github.com/go-gitea/gitea/pull/39058"}, {"source": "88ee5874-cf24-4952-aea0-31affedb7ff2", "url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.3"}, {"source": "88ee5874-cf24-4952-aea0-31affedb7ff2", "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-w4wc-g858-3672"}], "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-863"}], "source": "88ee5874-cf24-4952-aea0-31affedb7ff2", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.27.2]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Gitea", "source": "cna", "vendor": "Gitea"}, "product": "gitea", "vendor": "gitea"}], "created": "2026-10-15T02:30:11.035410+00:00", "updated": "2026-10-17T19:30:06.880031+00:00", "vendors": ["gitea", "gitea$PRODUCT$gitea"]}