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CVE-2026-107295

high

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 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.

CVSS
7.6
7.6 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/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: 2026-10-13 14:16
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 <1.107.4, ≥2.0.0 <2.28.0

Weakness classification (CWE)

CWE-352

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/security/advisories/GHSA-h4xc-3qfq-jf93
Patch / mitigation: https://github.com/pydantic/pydantic-ai/commit/d2690201a1834005d382dbf5c47e0ed94ef8bf46
Patch / mitigation: https://github.com/pydantic/pydantic-ai/commit/dd2abbdfa029c9ad138e7cc0edd2eaeaf9ed69c0
Patch / mitigation: https://github.com/pydantic/pydantic-ai/pull/7382
Patch / mitigation: https://github.com/pydantic/pydantic-ai/pull/7383
Patch / mitigation: https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.4
Patch / mitigation: https://github.com/pydantic/pydantic-ai/releases/tag/v2.28.0
Patch / mitigation: https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-h4xc-3qfq-jf93

References

Data sources

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

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CVE-2026-107292CVE-2026-107287CVE-2026-107286CVE-2026-107288CVE-2026-107289