CVE-2026-58270
Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters`
MEDIUM 6.5EPSS 0.3%
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.
- Affected
- Sync-in · server
- CVSS v3.1 GITHUB
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.35% chance of exploitation in the next 30 days, 27th percentile
- Published
- 2026-09-21
- Updated
- 2026-09-22