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

Quick assessment

Affected
pydantic pydantic-ai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Pydantic AI 是一个用于使用生成式 AI 构建应用程序和工作流的 Python 智能体框架。在版本 0.3.4 至 1.107.6 以及 2.44.0 之前，当使用 配置 OpenTelemetry 自动观测（instrumentation）时，敏感的智能体内容仍可能通过以下途径被导出： （异常消息）和 （异常堆栈跟踪）事件 错误状态描述 包含指令或提示输出模板的 尽管消息属性（message attributes）已被脱敏处理，但配置的后端遥测数据读取者仍可访问暴露的数据，这些数据可能包括工具反馈、提供

CVSS 2.3 · Low

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 4

VendorProduct Version RangeStatus
pydantic pydantic-ai >= 0.3.4, < 1.107.6 affected
>= 2.0.0b1, < 2.44.0 affected
pydantic pydantic-ai-slim >= 0.3.4, < 1.107.6 affected
>= 2.0.0b1, < 2.44.0 affected
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I. Basic Information for CVE-2026-107291

Vulnerability Information
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Vulnerability Title
Pydantic AI OpenTelemetry instrumentation: exception events on tool and agent run spans include content when `include_content=False`
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的不恰当跨边界移除
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pydantic pydantic-ai >= 0.3.4, < 1.107.6 -
pydantic pydantic-ai-slim >= 0.3.4, < 1.107.6 -

II. Public POCs for CVE-2026-107291

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III. Intelligence Information for CVE-2026-107291

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Vendor Pages for CVE-2026-107291 (2)

Other References for CVE-2026-107291 (11)

Same Patch Batch · pydantic · 2026-10-08 · 10 CVEs total

CVE-2026-107295 7.6 HIGH `pydantic-ai-slim` web UI `/api/chat` accepts browser-simple cross-origin requests that ca
CVE-2026-107286 7.5 HIGH Pydantic AI: Concurrency-limited models can keep their slot when a streamed request ends e
CVE-2026-107289 6.8 MEDIUM Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifier (incomplete fix
CVE-2026-107287 6.5 MEDIUM Pydantic AI: Excessive resource use when local web fetching converts nested HTML
CVE-2026-107290 6.5 MEDIUM Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`
CVE-2026-107294 6.5 MEDIUM Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl
CVE-2026-107292 6.4 MEDIUM Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the local chat endpoint does not v
CVE-2026-107288 3.7 LOW Pydantic AI: web_fetch_tool blocked_domains bypass via a hostname the resolver normalizes
CVE-2026-107293 2.3 LOW Pydantic AI OpenTelemetry instrumentation: retry prompt content is not redacted when `incl

IV. Related Vulnerabilities

Same product: pydantic-ai
Same vendor: pydantic
Same weakness: CWE-212

V. Comments for CVE-2026-107291

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