Vulnerability · Published Oct 8, 2026 · Assigned by GitHub_M
CVE-2026-107291Pydantic AI OpenTelemetry instrumentation: exception events on tool and agent run spans include content when `include_content=False`
Low 2.3
In plain English
A low-severity sensitive data in logs in pydantic-ai from pydantic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | pydantic-ai | 1.107.6 | GHSA-4x9p-g9wm-8q7f |
| PyPI | pydantic-ai | 2.44.0 | GHSA-4x9p-g9wm-8q7f |
| PyPI | pydantic-ai | 1.107.6, 2.44.0 | PYSEC-2026-4275 |
| PyPI | pydantic-ai-slim | 1.107.6 | GHSA-4x9p-g9wm-8q7f |
| PyPI | pydantic-ai-slim | 2.44.0 | GHSA-4x9p-g9wm-8q7f |
| PyPI | pydantic-ai-slim | 1.107.6, 2.44.0 | PYSEC-2026-4284 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pydantic | pydantic-ai | >= 0.3.4, < 1.107.6>= 2.0.0b1, < 2.44.0 |
| pydantic | pydantic-ai-slim | >= 0.3.4, < 1.107.6>= 2.0.0b1, < 2.44.0 |
Weakness: CWE-212, CWE-532 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-4x9p-g9wm-8q7f x_refsource_CONFIRM
- https://github.com/pydantic/pydantic-ai/pull/8403 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/pull/8404 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/pull/8408 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/pull/8428 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/pull/8429 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/commit/4e013c51a50659aba2adf7853bfb22bb77f6a518 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/commit/6b14c74cb281f899a2ae4fae5327111e33f60771 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/commit/7ee27e38ab2e525ca60ff1a25d16413ff989fd79 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/commit/963dec5f70d6f558997fc259356c0090cc5ea487 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/commit/de4e61515327bd80a19cd8552001c30933e6acc3 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.6 x_refsource_MISC
- https://github.com/pydantic/pydantic-ai/releases/tag/v2.44.0 x_refsource_MISC