Is there a public exploit for CVE-2026-48782?

No public exploit for CVE-2026-48782 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-48782?

CVE-2026-48782 scores CVSS 6.8 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.4%.

What does CVE-2026-48782 affect?

CVE-2026-48782 affects Pydantic pydantic-ai, pydantic-ai-slim. It is part of the AI and agent stack (PydanticAI).

6.8 Medium

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI.

CVE-2026-48782

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. In versions 1.56.0 through 1.101.0, 2.0.0b1, and 2.0.0b2, the cloud-metadata blocklist could be bypassed by encoding the metadata IP in an IPv6 transition form that the previous fix, CVE-2026-46678, did not decode, exposing cloud IAM short-term credentials. The previous remediation decoded only IPv4-mapped IPv6, 6to4, and the NAT64 well-known prefix, so the metadata guarantee did not hold for the remaining transition forms: IPv4-compatible IPv6 (::a.b.c.d), the NAT64 RFC 8215 local-use prefix (64:ff9b:1::/48), operator-chosen NAT64 prefixes, and ISATAP. The IPv6 wrapper is then delivered to the underlying IPv4 metadata endpoint. This occurs when an application using Pydantic AI opts a URL into forcedownload='allow-local' (which disables the default block on private/internal IPs) and runs on a network that actually routes the affected IPv6 transition forms: NAT64-configured networks (IPv6-only or dual-stack-with-NAT64 deployments, including some Kubernetes setups) for the NAT64 variants, or networks with an ISATAP tunnel for ISATAP. A standard dual-stack cloud VM or container does…

Part of the AI stack

This affects PydanticAI, in Agent frameworks.

Assessment

CVSS: 6.8 (v3.1)
Severity: Medium
EPSS: 0.4% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 16 June 2026
Last updated: 6 August 2026
Affected: Pydantic · pydantic-ai · pydantic-ai-slim
Weakness: CWE-918
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

At the source

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