CVE-2026-107292
6.4
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
Exploitability: 1.6 / Impact: 4.7
Source: security-advisories@github.com (Secondary)
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.
Affected (2)
Products: Pydantic: Pydantic Ai
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| From 1.34.0 to 1.107.5 |
Related CWEs
CWE-346
Origin Validation Error
The product does not properly verify that the source of data or communication is valid.
CWE-350
Reliance on Reverse DNS Resolution for a Security-Critical Action
The product performs reverse DNS resolution on an IP address to obtain the hostname and make a security decision, but it does not properly ensure that the IP address is truly associated with the hostname.
References (7)
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
PatchVendor Advisory
Source: security-advisories@github.com
PatchVendor Advisory
Source: security-advisories@github.com
PatchRelease NotesVendor Advisory
Source: security-advisories@github.com
PatchRelease NotesVendor Advisory
Source: security-advisories@github.com
Vendor Advisory
Timeline
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