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6.5 Medium

CVE-2026-107294 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI

Description

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 products and versions

Product Affected versions Fixed in
pydantic-ai 2.0 2.0.0b1 → < 2.24.0 2.24.0
pydantic-ai 1.77 1.77.0 → < 1.107.2 1.107.2
pydantic-ai-slim 2.0 2.0.0b1 → < 2.24.0 2.24.0
pydantic-ai-slim 1.77 1.77.0 → < 1.107.2 1.107.2

References

Timeline

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Other CVEs of pydantic-ai

The 16 CVEs of pydantic-ai →
CVE-2026-107295 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI 7.6 High CVE-2026-107293 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI 2.3 Low CVE-2026-107292 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI 6.4 Medium CVE-2026-107291 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI 2.3 Low
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