Pydantic Ai Slim
Monthly
Server-Side Request Forgery in Pydantic AI (versions 1.56.0-1.101.0, 2.0.0b1, 2.0.0b2) allows unauthenticated network attackers to bypass the cloud-metadata IP blocklist by encoding metadata service addresses (e.g., 169.254.169.254) in IPv6 transition forms - specifically IPv4-compatible IPv6, NAT64 RFC 8215 local-use prefixes, operator-chosen NAT64 prefixes, and ISATAP - that the prior remediation (CVE-2026-46678) failed to decode, enabling retrieval of cloud IAM short-term credentials. Exploitation is constrained by two simultaneous prerequisites: the application must use the non-default `force_download='allow-local'` mode and must operate on a network that routes the affected IPv6 transition forms (e.g., IPv6-only or dual-stack-with-NAT64 Kubernetes clusters). This is the third iteration in an escalating bypass chain (CVE-2026-25580 → CVE-2026-46678 → CVE-2026-48782), and no public exploit has been identified at time of analysis.
Server-Side Request Forgery in Pydantic AI (versions 1.56.0-1.101.0, 2.0.0b1, 2.0.0b2) allows unauthenticated network attackers to bypass the cloud-metadata IP blocklist by encoding metadata service addresses (e.g., 169.254.169.254) in IPv6 transition forms - specifically IPv4-compatible IPv6, NAT64 RFC 8215 local-use prefixes, operator-chosen NAT64 prefixes, and ISATAP - that the prior remediation (CVE-2026-46678) failed to decode, enabling retrieval of cloud IAM short-term credentials. Exploitation is constrained by two simultaneous prerequisites: the application must use the non-default `force_download='allow-local'` mode and must operate on a network that routes the affected IPv6 transition forms (e.g., IPv6-only or dual-stack-with-NAT64 Kubernetes clusters). This is the third iteration in an escalating bypass chain (CVE-2026-25580 → CVE-2026-46678 → CVE-2026-48782), and no public exploit has been identified at time of analysis.