CVE-2026-107290

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 webfetchtool and the WebFetch local fallback process server-controlled responses with quadratic title extraction, whitespace normalization, and...

CVE-2026-107290 Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`

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 webfetchtool and the WebFetch local fallback process server-controlled responses with quadratic title extraction, whitespace normalization, and...

CVE-2026-107290

The Pydantic AI Python agent framework is vulnerable to a denial-of-service condition in the local web_fetch_tool and the WebFetch local fallback process. Specifically, versions 1.77.0 to 1.107.6 and 2.44.0 exhibit quadratic title extraction , whitespace normalization, and ordered-list numbering ...