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Pydantic AI

Pydantic’s Python framework for building your own AI agents. Full changelog →

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Daily · Oct 20, 2026 · 🌶️🌶️🌶️Spicy: act this week (security, deadline, breaking) Why: Security fix

Pydantic AI keeps MCP tokens out of traces

Pydantic AI users, update now: two Medium security fixes are out, one for MCP credentials that could reach OpenTelemetry traces and one for the Vercel AI and AG-UI adapters.

Upgrade to 2.58.0, or 1.107.8 on v1, then restrict access to old traces and rotate any credentials they exposed.

Source: Pydantic AI v2.58.0 release notes

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