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CVE-2026-107288 Pydantic AI: web_fetch_tool blocked_domains bypass via a hostname the resolver normalizes differently

🗓️ 08 Oct 2026 15:18:40Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 7 Views

Pydantic AI web_fetch_tool blocked_domains bypass via hostname normalization differences.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-107288
8 Oct 202615:18
–cve
euvd
EUVD
EUVD-2026-95076
8 Oct 202615:18
–euvd
nvd
NVD
CVE-2026-107288
8 Oct 202616:17
–nvd
ptsecurity
Positive Technologies
PT-2026-108033
8 Oct 202600:00
–ptsecurity
vulnrichment
Vulnrichment
CVE-2026-107288 Pydantic AI: web_fetch_tool blocked_domains bypass via a hostname the resolver normalizes differently
8 Oct 202615:18
–vulnrichment
[
  {
    "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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