CVE-2026-58270

Published: Sep 21, 2026Modified: Sep 24, 2026Deferred

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 2.8 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-1333

Inefficient Regular Expression Complexity

The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.

References (2)

https://github.com/Sync-in/server/security/advisories/GHSA-jx63-h26r-8cph

Source: security-advisories@github.com

https://github.com/Sync-in/server/security/advisories/GHSA-jx63-h26r-8cph

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.