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Microsoft adds CVE-2026-118332 to Edge security update guidance

The Chromium Compositing flaw rates High severity and affects Chrome before version 156.0.8078.73.

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https://breach-signal.com/vulnerabilities/microsoft-edge-cve-2026-118332-security-update/

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PremierePC published an alert on Oct. 31, 2026 saying Microsoft added CVE-2026-118332 to its security update guidance.

The Compositing component in Chromium contains an improper input validation flaw tracked as CVE-2026-118332. Chrome assigned the CVE identifier, and the flaw affects Microsoft Edge since the browser is Chromium-based and ingests Chromium.

The flaw reaches Google Chrome releases before 156.0.8078.73. Using a crafted HTML page, a remote attacker could run code outside the sandbox. Chromium rates the severity High.

For patch details, Microsoft points readers to Google Chrome Releases. CVE-2026-118332 carries an EPSS probability of 0.29%. cvefeed.io posted its detail page on Oct. 27, 2026.

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