{"api_version":"1","generated_at":"2026-10-06T21:46:39+00:00","cve":"CVE-2026-103670","urls":{"html":"https://cve.report/CVE-2026-103670","api":"https://cve.report/api/cve/CVE-2026-103670.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-103670","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103670"},"summary":{"title":"Gitea trusted workflow cancellation by unapproved fork runs","description":"When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled without checking whether the new run still needed approval. Because fork pull request runs are inserted under the base repository, a user who can open a pull request from a fork could cancel trusted in-progress runs that share a concurrency group with `cancel-in-progress` enabled, without approval and without running any code. On self-hosted runners this can interrupt deployments and leave partial state behind.","state":"PUBLISHED","assigner":"Gitea","published_at":"2026-10-06 20:17:14","updated_at":"2026-10-06 20:17:14"},"problem_types":[],"metrics":[],"references":[{"url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0","name":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://blog.gitea.com/release-of-28.0.0/","name":"https://blog.gitea.com/release-of-28.0.0/","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/pull/39399","name":"https://github.com/go-gitea/gitea/pull/39399","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j","name":"https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103670","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103670","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Gitea","product":"Gitea","version":"affected 1.27.3 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"https://github.com/Pedromdsn","lang":"en"},{"source":"CNA","value":"https://github.com/bircni","lang":"en"},{"source":"CNA","value":"https://github.com/silverwind","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","packageName":"gitea.dev","product":"Gitea","vendor":"Gitea","versions":[{"lessThanOrEqual":"1.27.3","status":"affected","version":"0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"https://github.com/Pedromdsn"},{"lang":"en","type":"remediation developer","value":"https://github.com/bircni"},{"lang":"en","type":"remediation developer","value":"https://github.com/silverwind"}],"descriptions":[{"lang":"en","value":"When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled without checking whether the new run still needed approval. Because fork pull request runs are inserted under the base repository, a user who can open a pull request from a fork could cancel trusted in-progress runs that share a concurrency group with `cancel-in-progress` enabled, without approval and without running any code. On self-hosted runners this can interrupt deployments and leave partial state behind."}],"providerMetadata":{"dateUpdated":"2026-10-06T19:23:40.050Z","orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","shortName":"Gitea"},"references":[{"name":"GitHub Security Advisory GHSA-4j4g-m7mr-hp5j","tags":["vendor-advisory"],"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j"},{"name":"Fix: go-gitea/gitea pull request #39399","tags":["patch"],"url":"https://github.com/go-gitea/gitea/pull/39399"},{"name":"Gitea 28.0.0 release announcement","tags":["release-notes"],"url":"https://blog.gitea.com/release-of-28.0.0/"},{"name":"go-gitea/gitea v28.0.0 release","tags":["release-notes"],"url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0"}],"title":"Gitea trusted workflow cancellation by unapproved fork runs"}},"cveMetadata":{"assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","assignerShortName":"Gitea","cveId":"CVE-2026-103670","datePublished":"2026-10-06T19:23:40.050Z","dateReserved":"2026-10-04T21:57:35.576Z","dateUpdated":"2026-10-06T19:23:40.050Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 20:17:14","lastModifiedDate":"2026-10-06 20:17:14","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"103670","Ordinal":"1","Title":"Gitea trusted workflow cancellation by unapproved fork runs","CVE":"CVE-2026-103670","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"103670","Ordinal":"1","NoteData":"When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled without checking whether the new run still needed approval. Because fork pull request runs are inserted under the base repository, a user who can open a pull request from a fork could cancel trusted in-progress runs that share a concurrency group with `cancel-in-progress` enabled, without approval and without running any code. On self-hosted runners this can interrupt deployments and leave partial state behind.","Type":"Description","Title":"Gitea trusted workflow cancellation by unapproved fork runs"}]}}}