CVE-2026-46678 Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv4-mapped IPv6 (Incomplete fix of CVE-2026-25580)

Pydantic AI is a Python agent framework for building Generative AI applications. In versions 1.56.0 through 1.98.0, when an application opts a URL into forcedownload='allow-local' disabling the default block on private/internal IPs, the cloud-metadata blocklist could be bypassed by encoding the...