Description
Twenty is an open source CRM built with NestJS (Node.js). In versions 1.18.0 and earlier, the SSRF protection in twenty-server's SecureHttpClientService can be bypassed using IPv4-mapped IPv6 addresses in URL IP literals. Node.js's URL parser normalizes IPv4-mapped IPv6 addresses to compressed hex form (e.g., ::ffff:169.254.169.254 becomes ::ffff:a9fe:a9fe), but the isPrivateIp utility only recognizes the dotted-decimal notation. As a result, the hex form passes the SSRF check unchecked. Additionally, the socket lookup validation event does not fire for IP literal addresses, bypassing the second validation layer. An authenticated user can reach any internal IP, including cloud metadata endpoints, to exfiltrate credentials such as IAM keys.
INFO
Published Date :
2026-05-05T19:19:18.112Z
Last Modified :
2026-05-06T15:11:42.410Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-33975 vulnerability.
| Vendors | Products |
|---|---|
| Twenty |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33975.
