What’s Vulnerable › Vulnerabilities

CVE-2026-107293: Pydantic AI OpenTelemetry instrumentation: retry prompt content is not redacted when `include_content=False`

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-13
• Weakness: CWE-212

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.

Affected products

• pydantic-ai: from 0.3.4 before 1.107.4; from 2.0.0 before 2.27.1 — fixed in 1.107.4, 2.27.1

How to fix

Upgrade to a fixed version: pydantic-ai 1.107.4, 2.27.1. Check the vendor advisory for mitigations.

References

• https://github.com/pydantic/pydantic-ai/commit/fe9dbed7b7ccf7e7128b5786886e4441f6f5594f
• https://github.com/pydantic/pydantic-ai/pull/7357
• https://github.com/pydantic/pydantic-ai/releases/tag/v2.27.1
• https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-3gh4-cghq-f8v4

Get alerted when CVE-2026-107293 or the next vulnerability affects your stack