Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| pydantic | pydantic-ai | affected |
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| pydantic | pydantic-ai-slim | affected |
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Configuration 1 [-]
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No data.
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| Pydantic | Pydantic-ai |
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| Source | ID | Title |
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Github GHSA |
GHSA-q2xc-rrxj-58x9 | Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.132% probability within 30 days)
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ssvc
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Pydantic pydantic Ai
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| CPEs | cpe:2.3:a:pydantic:pydantic_ai:*:*:*:*:*:python:*:* cpe:2.3:a:pydantic:pydantic_ai:*:-:*:*:*:python:*:* |
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Pydantic pydantic Ai
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threat_severity
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threat_severity
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Pydantic
Pydantic pydantic-ai |
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Pydantic
Pydantic pydantic-ai |
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| 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. | |
| Title | Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header | |
| Weaknesses | CWE-346 CWE-350 |
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| Metrics |
cvssV3_1
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