{"id":"CVE-2026-58270","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-58270","generatedAt":"2026-10-27T23:56:47.310Z","title":"Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing.","description":"Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, the sync diff endpoint compiles a user-supplied string into a `RegExp` with no complexity validation. A catastrophic-backtracking pattern (e.g. `^(a+)+b`) blocks the Node.js event loop, making the entire server unresponsive to all users until the container is restarted. Version 2.4.0 patches the issue.","published":"2026-09-21T21:17:06.000Z","lastModified":"2026-09-24T21:25:27.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-1333"],"affected":[],"epss":{"score":0.00411,"percentile":0.35089,"date":"2026-10-26","history":[{"date":"2026-09-22","score":0.00289,"percentile":0.21755}]},"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 (0.41%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-21T21:17:06.000Z","detail":{"score":"6.5","severity":"MEDIUM","publishedAt":"2026-09-21T21:17:06.060Z"},"summary":"New CVE, medium severity (CVSS 6.5)."}],"references":[{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-jx63-h26r-8cph","source":"security-advisories@github.com"},{"url":"https://github.com/Sync-in/server/security/advisories/GHSA-jx63-h26r-8cph","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-58270","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."}