Skip to content
fr Sign in
6.5 Medium

CVE-2026-107290 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 1.107.6 and 2.44.0, the local web_fetch_tool and the WebFetch local fallback process server-controlled responses with quadratic title extraction, whitespace normalization, and ordered-list numbering. An attacker-controlled page of modest size can therefore block the event loop for an extended period, stalling other agent runs and requests, while unsupported codecs or excessive HTML or JSON nesting can abort an individual run. This issue is fixed in versions 1.107.6 and 2.44.0.

Affected products and versions

Product Affected versions Fixed in
pydantic-ai 2.0 2.0.0b1 → < 2.44.0 2.44.0
pydantic-ai 1.77 1.77.0 → < 1.107.6 1.107.6
pydantic-ai-slim 2.0 2.0.0b1 → < 2.44.0 2.44.0
pydantic-ai-slim 1.77 1.77.0 → < 1.107.6 1.107.6

References

Timeline

  1. Published
  2. Last modified

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-2026-107294 Pydantic AI is a Python agent framework for building applications and workflows with Generative AI 6.5 Medium 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
Track this CVE