Risk Letters

Exploited vulnerability

CVE-2026-87491

TLP:CLEAR

Google Chromium V8 Out of Bounds Write Vulnerability

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.

Facts

  • Vendor: Google
  • Product: Chromium V8
  • CVSS: 8.8
  • EPSS (probability of exploitation within 30 days): 3.5 %
  • On CISA's Known Exploited Vulnerabilities list since: 9 September 2026
  • First known exploitation: 9 September 2026
  • CISA's deadline for US federal agencies: 23 September 2026
  • Weakness: CWE-787
  • First seen by Risk Letters: 9 September 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD