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CVE-2026-87491

Google Chromium V8 Out of Bounds Write Vulnerability

Google Chromium V8Applications & CMS
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 9 Sep 2026CISA KEV
Exploit odds (EPSS)3.14%Chance of exploitation activity in the next 30 days, higher than 87% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in153.0.8010.36Fixed versionCVE List
Federal deadline23 Sep 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 9 Sep 2026, 00:09 UTCPublishedCVE List
  2. 9 Sep 2026Added to CISA KEVCISA KEV

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

Description

Google Chromium V8 contains an out of bounds write vulnerability that allows a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Text from CVE List

Affected versions 1

  • Chromeaffected: 153.0.8010.36 before 153.0.8010.36CVE List

References 4