{"id":"GHSA-g7mm-9vx7-jm7h","summary":"Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation","details":"### Impact\nA vulnerability in Woodpecker CI's gRPC layer allowed any authenticated agent to impersonate any other agent on the same server by injecting a forged `agent_id` value into outgoing gRPC metadata. The server correctly verified the JWT token but then discarded the verified agent identity in favor of the client-supplied value.\n\n### Patches\nDirect patch: https://github.com/woodpecker-ci/woodpecker/pull/6567\nLater proper fix: https://github.com/woodpecker-ci/woodpecker/pull/6569\n\n### Workarounds\nDisable org agents (`WOODPECKER_DISABLE_USER_AGENT_REGISTRATION=true`) and delete existing ones\n\n### Resources\nPublic ref: https://github.com/woodpecker-ci/woodpecker/issues/6541\nPrivate com: https://github.com/woodpecker-ci/woodpecker-security/issues/21","aliases":["CVE-2026-50141","GO-2026-5976"],"modified":"2026-07-21T19:54:00.672347428Z","published":"2026-07-14T19:00:29Z","database_specific":{"cwe_ids":["CWE-290","CWE-639"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-07-14T19:00:29Z","nvd_published_at":"2026-06-18T14:17:29Z"},"references":[{"type":"WEB","url":"https://github.com/woodpecker-ci/woodpecker/security/advisories/GHSA-g7mm-9vx7-jm7h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50141"},{"type":"WEB","url":"https://github.com/woodpecker-ci/woodpecker-security/issues/21"},{"type":"WEB","url":"https://github.com/woodpecker-ci/woodpecker/issues/6541"},{"type":"WEB","url":"https://github.com/woodpecker-ci/woodpecker/pull/6567"},{"type":"WEB","url":"https://github.com/woodpecker-ci/woodpecker/pull/6569"},{"type":"PACKAGE","url":"https://github.com/woodpecker-ci/woodpecker"}],"affected":[{"package":{"name":"go.woodpecker-ci.org/woodpecker/v3","ecosystem":"Go","purl":"pkg:golang/go.woodpecker-ci.org/woodpecker/v3"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"3.14.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-g7mm-9vx7-jm7h/GHSA-g7mm-9vx7-jm7h.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"}]}