CVE-2026-107293
Description
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.
How to fix
- pydantic pydantic_ai1.107.4, 2.27.1 or later
- pydantic-ai1.107.4, 2.27.1 or later
- pydantic-ai-slim1.107.4, 2.27.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pydantic pydantic_ai | 0.3.4 ≤ v < 1.107.4, 2.0.0 ≤ v < 2.27.1 | 1.107.4, 2.27.1 |
| pydantic-aiPyPI | 0.3.4 ≤ v < 1.107.4, 2.0.0b1 ≤ v < 2.27.1 | 1.107.4, 2.27.1 |
| pydantic-ai-slimPyPI | 0.3.4 ≤ v < 1.107.4, 2.0.0b1 ≤ v < 2.27.1 | 1.107.4, 2.27.1 |
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