Information disclosure in Pydantic Pydantic-Ai
CVE-2026-107293
Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 0.3.4 until 1.107.4 and 2.27.1, OpenTelemetry instrumentation configured with InstrumentationSettings(include_content=False) can export retry prompts outside tool calls in gen_ai.input.messages and pydantic_ai.all_messages. Agents using NativeOutput, PromptedOutput, or output validators on text output can therefore disclose validation feedback, including invalid model values quoted by that feedback, to readers of the telemetry backend. Tool-call retries and deployments that do not use include_content=False are not affected by this specific path. This issue is fixed in versions 1.107.4 and 2.27.1.
Published · last modified .
EPSS exploit prediction
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Affected products
- Pydantic Pydantic-Ai — versions >= 0.3.4, < 1.107.4, >= 2.0.0b1, < 2.27.1
- Pydantic Pydantic-Ai-Slim — versions >= 0.3.4, < 1.107.4, >= 2.0.0b1, < 2.27.1