CVE-2026-58270 | BDVDB-2026-377332 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-09-21Record published in the CVE List.
2. Version 22026-09-22Most recent update recorded in the CVE List.