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CVE-2026-48782 pydantic-ai: SSRF blocklist bypass via IPv4-compatible, SIIT/IVI, and local NAT64 IPv6 addresses (incomplete fix of CVE-2026-46678)

🗓️ 16 Jun 2026 22:49:26Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. In versions 1.56.0 through 1.101.0, 2.0.0b1, and 2.0.0b2, the cloud-metadata blocklist could be bypassed by encoding the metadata IP in an IPv6 tra...

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Affected
Refs
[
  {
    "vendor": "pydantic",
    "product": "pydantic-ai",
    "versions": [
      {
        "version": ">= 1.56.0, < 1.102.0",
        "status": "affected"
      },
      {
        "version": ">= 2.0.0b1, < 2.0.0b3",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "pydantic",
    "product": "pydantic-ai-slim",
    "versions": [
      {
        "version": ">= 2.0.0b1, < 2.0.0b3",
        "status": "affected"
      },
      {
        "version": ">= 1.56.0, < 1.102.0",
        "status": "affected"
      }
    ]
  }
]

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16 Jun 2026 22:49Current
CVSS 3.16.8
EPSS0.00042
5