CVE-2026-107292Medium· 6.4▾ SunlitPydantic 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 v…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.2 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 10.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.1%
Last analysed / modified upstream
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.
pydantic_ai >= 1.34.0, < 1.107.5pydantic_ai >= 2.0.0, < 2.30.0Upgrade past the affected range:
pydantic_ai 2.30.0Affected packages:
pydantic-ai >= 1.34.0, < 1.107.5pydantic-ai >= 2.0.0b1, < 2.30.0pydantic-ai-slim >= 1.34.0, < 1.107.5pydantic-ai-slim >= 2.0.0b1, < 2.30.0Patched in:
pydantic-ai 1.107.5pydantic-ai 2.30.0pydantic-ai-slim 1.107.5pydantic-ai-slim 2.30.0Connected by shared product, vendor, weakness, or advisory.
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