{"id":"CVE-2026-104965","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104965","generatedAt":"2026-10-28T00:59:17.327Z","title":"An authenticated user can create relations linking their own issues to issues in any other workspace on the instance, leaking issue metadata through activity events.","description":"Plane is an open-source project management tool. Prior to 1.4.0, the issue-relation endpoint accepts issue UUIDs in the request body without validating that they belong to the caller's workspace. An authenticated user can create relations linking their own issues to issues in any other workspace on the instance, leaking issue metadata through activity events. This issue is fixed in 1.4.0.","published":"2026-10-05T17:17:12.000Z","lastModified":"2026-10-05T18:17:32.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-639"],"affected":[],"epss":{"score":0.00217,"percentile":0.12107,"date":"2026-10-26","history":[{"date":"2026-10-06","score":0.00217,"percentile":0.11126}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-05T17:17:12.000Z","detail":{"score":"5.4","severity":"MEDIUM","publishedAt":"2026-10-05T17:17:12.103Z"},"summary":"New CVE, medium severity (CVSS 5.4)."}],"references":[{"url":"https://github.com/makeplane/plane/commit/81d9873d7f1cf1d1252ed53c12dd33696be73a89","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/pull/9269","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-8cvv-8jh5-g6mj","source":"security-advisories@github.com"},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-8cvv-8jh5-g6mj","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104965","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."}