CVE-2026-47684

Summary

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.

Affected Software

Weaknesses

• CWE-918: CWE-918: Server-Side Request Forgery (SSRF)

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg

References

• https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg
• https://github.com/Sync-in/server/releases/tag/v2.3.0

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