{"id":"CVE-2026-105634","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-105634","generatedAt":"2026-10-27T23:59:01.502Z","title":"Prior to 1.3.0, the ProjectMemberViewSet.partial_update method allows any project member, including a user with the lowest GUEST role, to modify another project member's role.","description":"Plane is an open-source project management tool. Prior to 1.3.0, the ProjectMemberViewSet.partial_update method allows any project member, including a user with the lowest GUEST role, to modify another project member's role. The authorization check prevents assigning a role higher than the requester's role but does not prevent assigning a lower or equal role, allowing a Guest to demote Administrators and Members and deny them project control. This vulnerability is fixed in 1.3.0.","published":"2026-10-05T19:17:17.000Z","lastModified":"2026-10-06T15:17:14.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},"cwe":["CWE-269"],"affected":[],"epss":{"score":0.00293,"percentile":0.21708,"date":"2026-10-26","history":[{"date":"2026-10-06","score":0.00293,"percentile":0.19969}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-05T19:17:17.000Z","detail":{"score":"8.1","severity":"HIGH","publishedAt":"2026-10-05T19:17:17.330Z"},"summary":"New CVE, high severity (CVSS 8.1)."}],"references":[{"url":"https://github.com/makeplane/plane/commit/587fe76032fb69275866fdeb655699a70a83c521","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/pull/8833","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/releases/tag/v1.3.0","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-494h-3rcq-5g3c","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-105634","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}