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Δ / VULNERABILITY RECORD

CVE-2026-4519.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSUnscoredNo severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Mar 31, 2026

Disclosure summary

webbrowser.open() allows leading dashes in URLs

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

Microsoft Security Updates (CVRF) · 2026-Mar

Open original source · Updated Mar 31, 2026

webbrowser.open() allows leading dashes in URLs

Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.

VendorProduct / associationVersion / bounds
Microsoft update guideazl3 python3 3.12.9-10 on Azure Linux 3.0 (MSRC status code 3)
Microsoft update guidecbl2 python3 3.9.19-19 on CBL Mariner 2.0 (MSRC status code 3)
Microsoft update guideazl3 python3 3.12.9-9 on Azure Linux 3.0 (MSRC status code 3)

Vendor remediation references

  • CBL-Mariner Releases · build 3.12.9-10 · product IDs 21100-17084, 20962-17084
  • Vendor guidance · product IDs 21100-17084, 20962-17084
  • CBL-Mariner Releases · build 3.9.19-20 · product IDs 20937-17086
  • Vendor guidance · product IDs 20937-17086

Original records & references

PUBLISHED 2026-03-24T21:05:36-04:00
MODIFIED 2026-03-31T11:18:21-04:00
INGESTED 2026-10-08T12:45:09-04:00