Answer in brief
CVE-2026-107291 records a Low severity (CVSS 2.3) vulnerability in Pydantic AI OpenTelemetry instrumentation: exception events on tool and agent run spans include content when `include_content=False`. The current sources do not mark it as known exploited. The current feed maps pydantic/pydantic-ai (generic), pydantic/pydantic-ai-slim (generic), pydantic-ai (pip), pydantic-ai (pip) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 2.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps pydantic/pydantic-ai (generic), pydantic/pydantic-ai-slim (generic), pydantic-ai (pip), pydantic-ai (pip) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| pydantic/pydantic-aigeneric | >=0.3.4 <1.107.6 || >=2.0.0b1 <2.44.0 | 1.107.6, 2.44.0 |
| pydantic/pydantic-ai-slimgeneric | >=0.3.4 <1.107.6 || >=2.0.0b1 <2.44.0 | 1.107.6, 2.44.0 |
| pydantic-aipip | >=0.3.4,<1.107.6 | 1.107.6 |
| pydantic-aipip | >=2.0.0b1,<2.44.0 | 2.44.0 |
| pydantic-ai-slimpip | >=0.3.4,<1.107.6 | 1.107.6 |
| pydantic-ai-slimpip | >=2.0.0b1,<2.44.0 | 2.44.0 |
| pydantic-aipypi | >=0.3.4 <1.107.6 | 1.107.6 |
| pydantic-aipypi | >=2.0.0b1 <2.44.0 | 2.44.0 |
| pydantic-ai-slimpypi | >=0.3.4 <1.107.6 | 1.107.6 |
| pydantic-ai-slimpypi | >=2.0.0b1 <2.44.0 | 2.44.0 |
Published upstream
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 8, 2026
Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 0.3.4 until 1.107.6 and 2.44.0, OpenTelemetry instrumentation configured with InstrumentationSettings(include_content=False) can still export sensitive agent content through exception.message and exception.stacktrace events, error status descriptions, and model_request_parameters containing instructions or the prompted_output_template. The exposed data is available to readers of the configured telemetry backend and can include tool feedback, provider error bodies, runtime instructions, and structured-output templates even though message attributes are redacted. This issue does not grant new access to agent data, and deployments that do not use include_content=False are not affected by the setting bypass. This issue is fixed in versions 1.107.6 and 2.44.0.
Quoted source text, attributed separately from HOL analysis.