CVE-2026-107289— Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifier (incomplete fix for CVE-2026-46678 and CVE-2026-48782)
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 是一个用于构建生成式 AI 应用程序和工作流的 Python 智能体框架。在版本 1.56.0 至 1.107.6（不含 1.107.6）以及 2.44.0 之前，若应用程序通过 FileUrl（使用 force_download='allow-local' 参数）或 web_fetch_tool（使用 allow_local_urls=True 参数）显式允许攻击者控制的 URL 访问本地网络，则攻击者可通过将 IPv6 区域标识符（zone identifier）附加到 IPv6 元数据
Possible ATT&CK Techniques 1 AI
T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-107289
Vulnerability Information
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Vulnerability Title
Pydantic AI: SSRF cloud-metadata blocklist bypass via IPv6 zone identifier (incomplete fix for CVE-2026-46678 and CVE-2026-48782)
Source: CVE Program / CVE List V5
Vulnerability Description
Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.56.0 until 1.107.6 and 2.44.0, applications that opt attacker-influenced URLs into local network access through FileUrl with force_download='allow-local' or web_fetch_tool with allow_local_urls=True can bypass the cloud-metadata blocklist by appending an IPv6 zone identifier to an IPv6 metadata address. IPv6Address equality and hashing include the zone identifier, so the blocklist comparison fails even though the network stack ignores the zone on a non-link-local destination and reaches the metadata service, potentially exposing cloud IAM credentials. The opt-in settings are disabled by default, and the issue requires an IPv6-enabled environment. This issue is fixed in versions 1.107.6 and 2.44.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| pydantic | pydantic-ai | >= 1.56.0, < 1.107.6 | - |
|
| pydantic | pydantic-ai-slim | >= 1.56.0, < 1.107.6 | - |
|
II. Public POCs for CVE-2026-107289
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-107289 (7)
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https://github.com/pydantic/pydantic-ai/pull/8402 x_refsource_MISC
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https://github.com/pydantic/pydantic-ai/pull/8401 x_refsource_MISC
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https://github.com/pydantic/pydantic-ai/releases/tag/v2.44.0 x_refsource_MISC
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https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.6 x_refsource_MISC
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https://github.com/pydantic/pydantic-ai/security/advisories/GHSA-vmxc-h2x2-jmf3 x_refsource_CONFIRM
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-2026-107287 | 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-2026-107291 | 2.3 LOW | Pydantic AI OpenTelemetry instrumentation: exception events on tool and agent run spans in |
| 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
-
CVE-2026-107295
`pydantic-ai-slim` web UI `/api/chat` accepts browser-simple -
CVE-2026-107294
Pydantic AI: Unbounded memory use when downloading remote co -
CVE-2026-107293
Pydantic AI OpenTelemetry instrumentation: retry prompt cont -
CVE-2026-107292
Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the -
CVE-2026-107291
Pydantic AI OpenTelemetry instrumentation: exception events
Same vendor: pydantic
-
CVE-2026-107295
`pydantic-ai-slim` web UI `/api/chat` accepts browser-simple -
CVE-2026-107294
Pydantic AI: Unbounded memory use when downloading remote co -
CVE-2026-107293
Pydantic AI OpenTelemetry instrumentation: retry prompt cont -
CVE-2026-107292
Pydantic AI Web chat UI (`Agent.to_web()`, `clai web`): the -
CVE-2026-107291
Pydantic AI OpenTelemetry instrumentation: exception events
Same weakness: CWE-918
-
CVE-2026-107698
FFmpeg before 7.1.4 and 8.0.2 SSRF via RTSP Redirect Handlin -
CVE-2026-107362
Server-Side Request Forgery in Malcolm -
CVE-2026-107288
Pydantic AI: web_fetch_tool blocked_domains bypass via a hos -
CVE-2026-14521
IBM DataPower Gateway affected by server-side request forger -
CVE-2026-107449
Heimdall<=2.8.3存在SSRF漏洞
V. Comments for CVE-2026-107289
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