Autogpt · Autogpt · CVE-2026-56663
**Name of the Vulnerable Software and Affected Versions**
AutoGPT versions prior to 0.6.52
**Description**
An authenticated user can bypass Server-Side Request Forgery (SSRF) and private-IP protections within the `SendWebRequestBlock` to access internal network services. The issue occurs because the ` is ip blocked()` function in `backend/backend/util/request.py` fails to normalize IPv4-mapped IPv6 addresses before comparing resolved IPs against blocked IPv4 ranges. Additionally, it does not block special-use ranges such as 100.64.0.0/10 (Carrier-Grade NAT, a mechanism allowing service providers to share a single public IPv4 address among multiple customers). Consequently, a hostname resolving to an IPv4-mapped IPv6 address can bypass validation and reach internal IPv4 endpoints.
**Recommendations**
Update to version 0.6.52.