CVE-2026-58270
🔶 mediumSummary
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.
CVSS Score
6.5
Medium
EPSS Score
0.3
Exploit Probability
Published Date
2026-09-21
First Seen: 2026-09-24
📊 Relative Risk Intelligence
This CVE is Lower Risk - more severe than 46.6% of all 361,609 vulnerabilities in our database.
#193,215
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Sep 22, 2026
🔍 Exploitation Status
Poc
Proof-of-concept available
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by
CISA
Last Modified
2026-09-22
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE IDs (Weakness Types)