{"id":"CVE-2026-104969","published":"2026-10-05T17:17:12.783","lastModified":"2026-10-05T18:17:32.003","description":"Plane is an open-source project management tool. Prior to 1.4.0, the cycle-issues endpoint accepts issue UUIDs in the request body without validating that they belong to the caller's workspace. An authenticated user can add issues from any workspace to a cycle they control. If a victim issue is already assigned to a cycle, the operation removes it from the victim's cycle, causing a destructive cross-tenant write. This issue is fixed in 1.4.0.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-639"],"vendors":[],"products":[],"references":[{"url":"https://github.com/makeplane/plane/commit/81d9873d7f1cf1d1252ed53c12dd33696be73a89","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9269","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-22g9-9xfv-q3fr","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-22g9-9xfv-q3fr","tags":[]}],"exploitRefs":[{"url":"https://github.com/makeplane/plane/commit/81d9873d7f1cf1d1252ed53c12dd33696be73a89","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9269","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-22g9-9xfv-q3fr","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-22g9-9xfv-q3fr","tags":[]}],"hasPoc":true,"ai":null}