CVE-2026-107292

Description

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.34.0 until 2.30.0, the Agent.to_web() and clai web development chat server does not validate the Host header, allowing a website visited by a developer to use DNS rebinding to reach a loopback-hosted agent as a same-origin service. The hostile page can read the served UI and submit chat requests that execute agent tools with the local process's privileges and credentials, causing data disclosure or unwanted side effects. Binding to localhost, Origin checks, and CSRF tokens do not prevent the same-origin DNS rebinding path. This issue is fixed in versions 1.107.5 and 2.30.0.

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Produits concernés

• pydantic-ai
• pydantic-ai-slim
• Pydantic pydantic ai

Scores CVSS

Faiblesses (CWE)

• CWE-346
• CWE-350

Références

• https://github.com/pydantic/pydantic-ai/commit/394cc1d31656620704a703a2daed752afa5135fe Patch
• https://github.com/pydantic/pydantic-ai/commit/871c7aeec5dfed2138655ccbccbf15c6d763bae7 Patch
• https://github.com/pydantic/pydantic-ai/pull/7437 PatchVendor Advisory
• https://github.com/pydantic/pydantic-ai/pull/7438 PatchVendor Advisory
• https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.5 PatchRelease NotesVendor Advisory
• https://github.com/pydantic/pydantic-ai/releases/tag/v2.30.0 PatchRelease NotesVendor Advisory
• https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-q2xc-rrxj-58x9 Vendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories