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Δ / VULNERABILITY RECORD

CVE-2026-70309.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 5.4No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Aug 28, 2026

Disclosure summary

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Source-reported weakness categories

CWE-346

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-Aug

Open original source · Updated Aug 28, 2026

Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

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

Microsoft maximum product score: 5.4

VendorProduct / associationVersion / bounds
Microsoft update guideMicrosoft Edge (Chromium-based) (MSRC status code 3)

Vendor remediation references

  • Release Notes · build 150.0.4078.65 · product IDs 11655
  • Vendor guidance · product IDs 11655

Original records & references

PUBLISHED 2026-08-28T03:00:00-04:00
MODIFIED 2026-08-28T03:00:00-04:00
INGESTED 2026-10-08T12:40:37-04:00