CVE-2026-107292 (GCVE-0-2026-107292)
Vulnerability from cvelistv5
Published
2026-10-08 16:26
Modified
2026-10-14 01:01
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
CWE
  • CWE-346 - Origin Validation Error
  • CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action
Summary
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.
References
Impacted products
Vendor Product Version
pydantic pydantic-ai Version: >= 1.34.0, < 2.0.0b1
Version: >= 2.0.0b1, < 2.30.0
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   pydantic pydantic-ai-slim Version: >= 1.34.0, < 2.0.0b1
Version: >= 2.0.0b1, < 2.30.0
 Create a notification for this product.
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