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CVE-2026-107290 Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`

🗓️ 08 Oct 2026 16:09:04Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 3 Views

Quadratic title extraction in Pydantic AI web_fetch_tool causes local event loop DoS.

Related
Affected
Refs
[
  {
    "vendor": "pydantic",
    "product": "pydantic-ai",
    "versions": [
      {
        "version": ">= 1.77.0, < 1.107.6",
        "status": "affected"
      },
      {
        "version": ">= 2.0.0b1, < 2.44.0",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "pydantic",
    "product": "pydantic-ai-slim",
    "versions": [
      {
        "version": ">= 1.77.0, < 1.107.6",
        "status": "affected"
      },
      {
        "version": ">= 2.0.0b1, < 2.44.0",
        "status": "affected"
      }
    ]
  }
]

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