CVE-2026-107289 (GCVE-0-2026-107289)
Vulnerability from cvelistv5
Published
2026-10-08 15:20
Modified
2026-10-08 16:07
Severity ?
6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Summary
Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.56.0 until 1.107.6 and 2.44.0, applications that opt attacker-influenced URLs into local network access through FileUrl with force_download='allow-local' or web_fetch_tool with allow_local_urls=True can bypass the cloud-metadata blocklist by appending an IPv6 zone identifier to an IPv6 metadata address. IPv6Address equality and hashing include the zone identifier, so the blocklist comparison fails even though the network stack ignores the zone on a non-link-local destination and reaches the metadata service, potentially exposing cloud IAM credentials. The opt-in settings are disabled by default, and the issue requires an IPv6-enabled environment. This issue is fixed in versions 1.107.6 and 2.44.0.
References
Impacted products
Vendor Product Version
pydantic pydantic-ai Version: >= 1.56.0, < 1.107.6
Version: >= 2.0.0b1, < 2.44.0
 Create a notification for this product.
   pydantic pydantic-ai-slim Version: >= 1.56.0, < 1.107.6
Version: >= 2.0.0b1, < 2.44.0
 Create a notification for this product.
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