What is CVE-2026-87491?

CVE-2026-87491 is a security advisory published by Microsoft Security Response Center (MSRC). Chromium CVE-2026-87491: Out of bounds write in V8

Which CVE IDs does CVE-2026-87491 cover?

CVE-2026-87491 covers the following CVE IDs: CVE-2026-87491. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-87491?

CVE-2026-87491 affects 1 product, including: Microsoft Edge (Chromium-based).

CVE-2026-87491

Chromium CVE-2026-87491: Out of bounds write in V8

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-87491 →

📋 Description

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information. Google is aware that an exploit for CVE-2026-87491 exists in the wild.

🎯 Affected products1

Microsoft Edge (Chromium-based)

✅ Remediation

KBRelease Notes (Security Update) — fixed build 152.0.4191.66

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87491
referencehttps://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security