Status: KEV
| Advisory ID: CVE-2026-87491
Key Details
| CVE | CVE-2026-87491 |
| Vulnerability Name | Google Chromium V8 Out of Bounds Write Vulnerability |
| CVSS Score / Version | 8.8 (High) / CVSS v3.1 |
| Updated | 2026-09-18 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | Google Chromium V8 |
| Exploitation status | Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation. |
| KEV listing | Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-09-09. |
| Exploitation prediction (EPSS) | 3.14% probability of exploitation in the next 30 days (87% percentile) -- FIRST.org's EPSS model. |
Affected Products, Subsystems & Sectors
| Subsystems | General OT |
| Sectors | Multiple |
What to Know
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.
What to Do
Monitor Google's web page for any future patch releases. See vendor advisory link below.
References
KEV Required Action