---
id: CVE-2026-107294
title: >-
  Pydantic AI is a Python agent framework for building applications and
  workflows with Generative AI
summary: >-
  Pydantic AI is a Python agent framework for building applications and
  workflows with Generative AI. From 1.77.0 until 1.107.2 and 2.24.0,
  web_fetch_tool, the WebFetch local fallback, and remote FileUrl media
  downloads buffer the complete…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
vendor: pydantic
product: pydantic_ai
affected:
  - 'pydantic_ai >= 1.77.0, < 1.107.2'
  - 'pydantic_ai >= 2.0.0, < 2.24.0'
patched:
  - pydantic_ai 2.24.0
published: '2026-10-08'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T13:49:02.473'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107294'
references:
  - url: >-
      https://github.com/pydantic/pydantic-ai/commit/7a64d049c3f5271a975cd1d64b2fa876d83ede1d
    label: security-advisories@github.com
  - url: >-
      https://github.com/pydantic/pydantic-ai/commit/e3824a58c82864ed26afb2887619834a4eb86cc8
    label: security-advisories@github.com
  - url: 'https://github.com/pydantic/pydantic-ai/pull/7141'
    label: security-advisories@github.com
  - url: 'https://github.com/pydantic/pydantic-ai/pull/7308'
    label: security-advisories@github.com
  - url: 'https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.2'
    label: security-advisories@github.com
  - url: 'https://github.com/pydantic/pydantic-ai/releases/tag/v2.24.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-v2xh-2vp8-57h8
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-v2xh-2vp8-57h8'
  - url: 'https://github.com/pydantic/pydantic-ai'
  - url: 'https://pypi.org/project/pydantic-ai'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107294'
  - url: 'https://pypi.org/project/pydantic-ai-slim'
tags:
  - nvd
  - ghsa
  - pip
  - cve.org
  - osv
epss: 0.00437
epssPercentile: 0.37789
aliases:
  - GHSA-v2xh-2vp8-57h8
  - PYSEC-2026-4280
  - PYSEC-2026-4289
ecosystem: pip
ingestedAt: '2026-10-08T17:56:11.713Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-08T20:23:19.119515Z'
---

## Overview

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.77.0 until 1.107.2 and 2.24.0, web_fetch_tool, the WebFetch local fallback, and remote FileUrl media downloads buffer the complete HTTP response body before enforcing content-size controls. An attacker-influenced URL can stream an arbitrarily large response that exhausts process memory and crashes the worker; affected media types include ImageUrl, DocumentUrl, VideoUrl, and AudioUrl. SSRF protections remain effective, and the impact is limited to availability. This issue is fixed in versions 1.107.2 and 2.24.0.

## Affected

- `pydantic_ai >= 1.77.0, < 1.107.2`
- `pydantic_ai >= 2.0.0, < 2.24.0`

## Remediation

Upgrade past the affected range:

- `pydantic_ai 2.24.0`

## Package advisory (CVE-2026-107294)

Affected packages:

- `pydantic-ai >= 1.77.0, < 1.107.2`
- `pydantic-ai >= 2.0.0b1, <= 2.23.0`
- `pydantic-ai-slim >= 1.77.0, < 1.107.2`
- `pydantic-ai-slim >= 2.0.0b1, <= 2.23.0`

Patched in:

- `pydantic-ai 1.107.2`
- `pydantic-ai 2.24.0`
- `pydantic-ai-slim 1.107.2`
- `pydantic-ai-slim 2.24.0`

Source: https://github.com/advisories/GHSA-v2xh-2vp8-57h8