CVE-2026-87491
Out of Bounds Write in Google Chromium V8. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 9 September 2026.
- Product
- Google Chromium V8
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s 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.
More from Google this year.
- CVE-2026-111497 Unchecked Return Value, added
- CVE-2026-58704 Improper Authorization, added
- CVE-2026-85046 Type Confusion, added
- CVE-2026-11645 Out-of-Bounds Read and Write, added
- CVE-2026-5281 Use-After-Free, added
- CVE-2026-3910 Improper Restriction of Operations Within the Bounds of a Memory Buffer, added
- CVE-2026-3909 Out-of-Bounds Write, added
- CVE-2026-2441 CSS Use-After-Free, added
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 4 November 2026.