What is CVE-2026-87491?
Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Timeline
- 2026-09-09Published to the U.S. National Vulnerability Database (NVD)
- 2026-09-09Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-09-10NVD record last updated
- 2026-09-23CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
Google Chromium V8 Out of Bounds Write Vulnerability
Affected product
Google Chromium V8
Remediation Steps
- Update Google Chrome to the latest patched version released by Google
- Enable automatic updates for Chrome across all managed endpoints
- Verify complete deployment of patches through endpoint management tools
- Review browser security policies to restrict execution of untrusted content where possible
References
- https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html
- https://issues.chromium.org/issues/543557673
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87491
- https://nvd.nist.gov/vuln/detail/CVE-2026-87491
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 1 of September 2026 (September 7 – 13)
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.