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Δ / VULNERABILITY RECORD

CVE-2026-21518.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 8.8No severity score in this snapshot.
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSMicrosoft vendor recordModified Apr 01, 2026

Disclosure summary

Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.

Source-reported weakness categories

CWE-77

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-Feb

Open original source · Updated Apr 01, 2026

GitHub Copilot and Visual Studio Code 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: 8.8

VendorProduct / associationVersion / bounds
Microsoft update guideVisual Studio Code (MSRC status code 3)
Microsoft update guideMicrosoft Visual Studio Code CoPilot Chat Extension (MSRC status code 3)

Vendor remediation references

Original records & references

PUBLISHED 2026-02-10T03:00:00-05:00
MODIFIED 2026-04-01T03:00:00-04:00
INGESTED 2026-10-08T12:45:18-04:00