{"id":"CVE-2026-105633","title":"Plane is an open-source project management tool","summary":"Plane is an open-source project management tool. Prior to 1.4.0, the V2 issue-attachment PATCH endpoint accepts issue_id in the URL but omits it from the database query. A project member can use an issue_id they control in the URL while …","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","cwe":["CWE-639"],"vendor":"makeplane","product":"plane","affected":["plane < 1.4.0"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T18:17:36.890","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105633","references":[{"url":"https://github.com/makeplane/plane/commit/5829f0febf0739494d576b60d4943d10d236bc96","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/pull/9315","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","label":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w","label":"security-advisories@github.com"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-05T18:21:45.443968Z"},"ingestedAt":"2026-10-05T18:29:11.200Z","slug":"CVE-2026-105633","body":"## Overview\n\nPlane is an open-source project management tool. Prior to 1.4.0, the V2 issue-attachment PATCH endpoint accepts issue_id in the URL but omits it from the database query. A project member can use an issue_id they control in the URL while targeting another user's attachment by its pk UUID. Because the server matches only pk, workspace, and project_id, it modifies the attachment regardless of the issue_id in the URL. When the attachment is pending and has not been confirmed as uploaded, the PATCH handler sets created_by = request.user and transfers attachment ownership to the attacker. This issue is fixed in 1.4.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}