{"api_version":"1","generated_at":"2026-06-27T18:35:16+00:00","cve":"CVE-2026-20912","urls":{"html":"https://cve.report/CVE-2026-20912","api":"https://cve.report/api/cve/CVE-2026-20912.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-20912","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-20912"},"summary":{"title":"Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure","description":"Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.","state":"PUBLISHED","assigner":"Gitea","published_at":"2026-01-22 22:16:19","updated_at":"2026-06-27 05:16:42"},"problem_types":["CWE-284","CWE-639","CWE-283","CWE-284 CWE-284: Improper Access Control","CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key","CWE-283 Unverified Ownership"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}},{"version":"3.1","source":"ADP","type":"CVSS","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}},{"version":"3.1","source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary","score":"9.1","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"}}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw","name":"https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":["Broken Link"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://blog.gitea.com/release-of-1.25.4/","name":"https://blog.gitea.com/release-of-1.25.4/","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":["Release Notes"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://access.redhat.com/security/cve/CVE-2026-20912","name":"https://access.redhat.com/security/cve/CVE-2026-20912","refsource":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2432219","name":"https://bugzilla.redhat.com/show_bug.cgi?id=2432219","refsource":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json","name":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json","refsource":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.25.4","name":"https://github.com/go-gitea/gitea/releases/tag/v1.25.4","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":["Release Notes"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/pull/36320","name":"https://github.com/go-gitea/gitea/pull/36320","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":["Issue Tracking","Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/pull/36355","name":"https://github.com/go-gitea/gitea/pull/36355","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":["Issue Tracking","Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-20912","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20912","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Gitea","product":"Gitea Open Source Git Server","version":"affected 1.25.3 semver","platforms":[]},{"source":"ADP","vendor":"Red Hat","product":"OpenShift Pipelines","version":"","platforms":[]}],"timeline":[{"source":"ADP","time":"2026-01-22T23:02:45.929Z","lang":"en","value":"Reported to Red Hat."},{"source":"ADP","time":"2026-01-22T22:01:52.026Z","lang":"en","value":"Made public."}],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"spingARbor","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"20912","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gitea","cpe5":"gitea","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"-","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-20912","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-01-23T17:51:12.073308Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-01-23T21:53:41.649Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"},{"affected":[{"cpes":["cpe:/a:redhat:openshift_pipelines:1"],"defaultStatus":"unaffected","product":"OpenShift Pipelines","vendor":"Red Hat"}],"datePublic":"2026-01-22T22:01:52.026Z","descriptions":[{"lang":"en","value":"An access control flaw has been discovered in Gitea. Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Critical"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-283","description":"Unverified Ownership","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-27T04:05:09.432Z","orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP"},"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-20912"},{"name":"RHBZ#2432219","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2432219"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json"}],"timeline":[{"lang":"en","time":"2026-01-22T23:02:45.929Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-01-22T22:01:52.026Z","value":"Made public."}],"title":"gitea: Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure","x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"}}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Gitea Open Source Git Server","vendor":"Gitea","versions":[{"lessThanOrEqual":"1.25.3","status":"affected","version":"0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"spingARbor"}],"descriptions":[{"lang":"en","value":"Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-01-22T22:01:52.026Z","orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","shortName":"Gitea"},"references":[{"name":"GitHub Security Advisory","tags":["vendor-advisory"],"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw"},{"name":"GitHub Pull Request #36320","tags":["patch"],"url":"https://github.com/go-gitea/gitea/pull/36320"},{"name":"GitHub Pull Request #36355","tags":["patch"],"url":"https://github.com/go-gitea/gitea/pull/36355"},{"name":"Gitea v1.25.4 Release","tags":["release-notes"],"url":"https://github.com/go-gitea/gitea/releases/tag/v1.25.4"},{"name":"Gitea v1.25.4 Release Blog Post","tags":["release-notes"],"url":"https://blog.gitea.com/release-of-1.25.4/"}],"title":"Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure"}},"cveMetadata":{"assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","assignerShortName":"Gitea","cveId":"CVE-2026-20912","datePublished":"2026-01-22T22:01:52.026Z","dateReserved":"2026-01-08T23:02:37.548Z","dateUpdated":"2026-06-27T04:05:09.432Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-01-22 22:16:19","lastModifiedDate":"2026-06-27 05:16:42","problem_types":["CWE-284","CWE-639","CWE-283","CWE-284 CWE-284: Improper Access Control","CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key","CWE-283 Unverified Ownership"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":5.2},{"source":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-01-23T17:51:12.073308Z","id":"CVE-2026-20912","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:gitea:gitea:*:*:*:*:*:-:*:*","versionEndExcluding":"1.25.4","matchCriteriaId":"DFCB7D74-331D-4582-AB41-113A25BE8FAA"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"20912","Ordinal":"1","Title":"Gitea: Cross-Repository Authorization Bypass via Release Attachm","CVE":"CVE-2026-20912","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"20912","Ordinal":"1","NoteData":"Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.","Type":"Description","Title":"Gitea: Cross-Repository Authorization Bypass via Release Attachm"}]}}}