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: 2026-09-21
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jx63-h26r-8cph Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters`
History

Thu, 24 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Sync-in
Sync-in server
Vendors & Products Sync-in
Sync-in server

Mon, 21 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Sync-in Server has a ReDoS via Unsanitized Regex in Sync Diff `pathFilters`
Weaknesses CWE-1333
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-22T14:06:46.587Z

Reserved: 2026-06-29T21:54:30.332Z

Link: CVE-2026-58270

cve-icon Vulnrichment

Updated: 2026-09-22T14:06:42.743Z

cve-icon NVD

Status : Deferred

Published: 2026-09-21T21:17:06.060

Modified: 2026-09-24T21:25:27.050

Link: CVE-2026-58270

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T21:30:11Z

Weaknesses
  • CWE-1333

    Inefficient Regular Expression Complexity