`pydantic-ai-slim` web UI `/api/chat` accepts browser-simple cross-origin requests that can trigger agent tool execution
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
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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.
| Vendor | Product | Versions | ||||||||||||
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| Pydantic | Pydantic-ai |
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| Source | ID | Title |
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Github GHSA |
GHSA-h4xc-3qfq-jf93 | Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): a website visited by the developer can trigger agent runs and server-side tool execution on the local chat endpoint |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.158% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
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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| Vendors & Products |
Pydantic pydantic Ai
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| Type | Values Removed | Values Added |
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| Weaknesses | CWE-346 | |
| References |
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| Metrics |
threat_severity
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threat_severity
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| Metrics |
ssvc
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| First Time appeared |
Pydantic
Pydantic pydantic-ai |
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| Vendors & Products |
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 1.107.4 and 2.28.0, the Agent.to_web() and clai web development chat endpoint has missing request content-type validation. A website visited by a developer can submit a browser-compatible request to a loopback-hosted chat server, causing the served agent to run and execute tools with the privileges and credentials of the local process; client-relayed approval decisions also leave requires_approval=True tools exposed. Binding to localhost does not prevent a browser page from reaching the loopback address. This issue is fixed in versions 1.107.4 and 2.28.0. | |
| Title | `pydantic-ai-slim` web UI `/api/chat` accepts browser-simple cross-origin requests that can trigger agent tool execution | |
| Weaknesses | CWE-352 | |
| References |
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| Metrics |
cvssV3_1
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