Low 2.3Published Oct 8, 2026

CVE-2026-107291Pydantic AI OpenTelemetry instrumentation: exception events on tool and agent run spans include content when `include_content=False`

Updated under an hour ago (Oct 28, 2026, 8:23 AM ET)

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Every CVE for pydantic-ai

Exploited in the last 30 days

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.

CVSS: 2.3 LOW (v4.0, CNA)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
Weakness (CWE): CWE-212, CWE-532
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pydantic pydantic-ai pydantic:ai (from the name)	from 0.3.4, < 1.107.6; from 2.0.0b1, < 2.44.0	CNA record
pydantic pydantic-ai-slim pydantic:ai_slim (from the name)	from 0.3.4, < 1.107.6; from 2.0.0b1, < 2.44.0	CNA record
pydantic pydantic_ai pydantic:pydantic_ai	from 0.3.4 before 1.107.4; from 2.0.0 before 2.44.0	NVD

References

References

https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-4x9p-g9wm-8q7f	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/pydantic/pydantic-ai/pull/8403	x-refsource-misc, patch, vendor-advisory
https://github.com/pydantic/pydantic-ai/pull/8404	x-refsource-misc, patch, vendor-advisory
https://github.com/pydantic/pydantic-ai/pull/8408	x-refsource-misc, patch, vendor-advisory
https://github.com/pydantic/pydantic-ai/pull/8428	x-refsource-misc, patch, vendor-advisory
https://github.com/pydantic/pydantic-ai/pull/8429	x-refsource-misc, exploit, patch, vendor-advisory
https://github.com/pydantic/pydantic-ai/commit/4e013c51a50659aba2adf7853bfb22bb77f6a518	x-refsource-misc, patch
https://github.com/pydantic/pydantic-ai/commit/6b14c74cb281f899a2ae4fae5327111e33f60771	x-refsource-misc, patch
https://github.com/pydantic/pydantic-ai/commit/7ee27e38ab2e525ca60ff1a25d16413ff989fd79	x-refsource-misc, patch
https://github.com/pydantic/pydantic-ai/commit/963dec5f70d6f558997fc259356c0090cc5ea487	x-refsource-misc, patch
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.