Vulnerability Description
Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses (e.g. ::ffff:127.0.0.1), allowing SSRF protection to be bypassed on dual-stack systems. Version 2.3.0 fixes the issue.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/Sync-in/server/releases/tag/v2.3.0
- https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg
- https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg
FAQ
What is CVE-2026-47684?
CVE-2026-47684 is a vulnerability with a CVSS score of 7.7 (HIGH). Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not...
How severe is CVE-2026-47684?
CVE-2026-47684 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-47684?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.