Server-side Request Forgery (SSRF) Affecting pydantic-ai-slim package, versions [1.65.0,1.106.0)[2.0.0b1,2.0.0b6)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published16 Aug 2026
- disclosed13 Aug 2026
- creditEQSTLab
Introduced: 13 Aug 2026
NewCVE-2026-54249 (opens in a new tab)How to fix?
Upgrade pydantic-ai-slim to version 1.106.0, 2.0.0b6 or higher.
Overview
pydantic-ai-slim is an Agent Framework / shim to use Pydantic with LLMs, slim package
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) through UIAdapter.sanitize_messages in pydantic_ai_slim/pydantic_ai/ui/_adapter.py and VercelAIAdapter.from_request/dispatch_request in pydantic_ai_slim/pydantic_ai/ui/vercel_ai/_adapter.py. An attacker can cause the server to fetch arbitrary provider or cloud-storage files with its own credentials by submitting message history that contains client-controlled UploadedFile references in providerMetadata. This lets the attacker read files the application’s model-provider or storage identity can access, exposing private objects or other tenants’ data to the user.