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CVE-2026-107292

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2026
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not validate the `Host` header

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.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

pydantic-ai

Vendor
pydantic
Product
pydantic-ai
Platforms
Unknown
Default status
Unknown
pydantic-ai · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
>= 1.34.0, < 2.0.0b1affectedUnavailableUnavailableUnavailableNone listed
>= 2.0.0b1, < 2.30.0affectedUnavailableUnavailableUnavailableNone listed

pydantic-ai-slim

Vendor
pydantic
Product
pydantic-ai-slim
Platforms
Unknown
Default status
Unknown
pydantic-ai-slim · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
>= 1.34.0, < 2.0.0b1affectedUnavailableUnavailableUnavailableNone listed
>= 2.0.0b1, < 2.30.0affectedUnavailableUnavailableUnavailableNone listed