CVE-2026-47684

描述

Summary: 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. Affected components backend/src/applications/files/services/files-manager.service.ts – downloadFromUrl() checks regExpPrivateIP against request.socket.remoteAddress. backend/src/applications/files/utils/url-file.ts – regExpPrivateIP does not include ::ffff:<ipv4> variants. Details: The regExpPrivateIP regex in backend/src/applications/files/utils/url-file.ts correctly blocks standard IPv4 private ranges but does not include ::ffff: prefixed variants. On dual-stack systems, Node.js can report a socket's remoteAddress in IPv4-mapped IPv6 form, meaning the check in FilesManager.downloadFromUrl() can be bypassed entirely. PoC: [poc.pdf](https://github.com/user-attachments/files/26990874/poc.pdf) Proof: <img width="1080" height="842" alt="1000226655" src="https://github.com/user-attachments/assets/797cea83-0a08-4a16-a91b-31c51068d473" /> Impact: An attacker can supply a crafted URL pointing to an internal address that gets reported as ::ffff:127.0.0.1 or ::ffff:10.x.x.x, causing the server to fetch internal resources that should be blocked. Any user with access to the file download feature is a potential attacker.

如何修補 CVE-2026-47684

要修補 CVE-2026-47684,請將受影響套件升級到下列已修補版本。

• —升級至 2.3.0 或更新版本

CVE-2026-47684 正在被利用嗎?

目前沒有被利用訊號。CVE-2026-47684 既不在 CISA KEV 也沒有最新的 EPSS 分數。

受影響套件(1)

• from 0, < 2.3.0

CVSS 分數

參考連結(3)

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