CVE-2026-47684
High
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.
SeverityHigh
CVSS7.7
Exploit probability—
Product@sync-in/server
PublishedJun 16, 2026
First seenJun 16, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- @sync-in/server2.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @sync-in/servernpm | v < 2.3.0 | 2.3.0 |
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