CVE-2026-107292

medium

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI.

Vendor / product: Pydantic — pydantic ai

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.

CVSS

6.4

6.4 (CVSS v3.1)

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L

Severity source: NVD CVSS v3.1 (security-advisories@github.com)

Timeline (UTC)

Published: 2026-10-08 17:17

Modified: 2026-10-14 01:17

NVD status: Analyzed

Last synced 3 days ago

Verified against the source API 2026-10-27 06:58 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

pydantic / pydantic_ai ≥1.34.0 <1.107.5, ≥2.0.0 <2.30.0

Weakness classification (CWE)

CWE-346 CWE-350

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/pydantic/pydantic-ai/pull/7437

Vendor advisory: https://github.com/pydantic/pydantic-ai/pull/7438

Vendor advisory: https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.5

Vendor advisory: https://github.com/pydantic/pydantic-ai/releases/tag/v2.30.0

Vendor advisory: https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-q2xc-rrxj-58x9

Patch / mitigation: https://github.com/pydantic/pydantic-ai/commit/394cc1d31656620704a703a2daed752afa5135fe

Patch / mitigation: https://github.com/pydantic/pydantic-ai/commit/871c7aeec5dfed2138655ccbccbf15c6d763bae7

Patch / mitigation: https://github.com/pydantic/pydantic-ai/pull/7437

Patch / mitigation: https://github.com/pydantic/pydantic-ai/pull/7438

Patch / mitigation: https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.5

Patch / mitigation: https://github.com/pydantic/pydantic-ai/releases/tag/v2.30.0

References

https://github.com/pydantic/pydantic-ai/commit/394cc1d31656620704a703a2daed752afa5135fe security-advisories@github.com
https://github.com/pydantic/pydantic-ai/commit/871c7aeec5dfed2138655ccbccbf15c6d763bae7 security-advisories@github.com
https://github.com/pydantic/pydantic-ai/pull/7437 security-advisories@github.com
https://github.com/pydantic/pydantic-ai/pull/7438 security-advisories@github.com
https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.5 security-advisories@github.com
https://github.com/pydantic/pydantic-ai/releases/tag/v2.30.0 security-advisories@github.com
https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-q2xc-rrxj-58x9 security-advisories@github.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:58 UTC · record ↗

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CVE-2026-107292

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