Google Chromium V8 Out of Bounds Write Vulnerability
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)
What happened
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)
CISA lists it as exploited, added 09 Sep 2026.
Does it affect you
Names Google Chrome. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
chromereleases.googleblog.com - Apply 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.gov
CISA’s notes for this entry:
- chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html
- BOD 26-04: cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- Forensics Triage Requirements: cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- nvd.nist.gov/vuln/detail/CVE-2026-87491
Affected, as published to NVD
- chrome
- Google Chrome: everything below 153.0.8010.36
The record
- NVD status
- Modified
- Published
- 09 Sep 2026, last modified 10 Sep 2026 (NVD)
- Severity
- CVSS 3.1 base score 8.8, High — computed here from the vector; NVD states 8.8.
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness
- CWE-787 Out-of-bounds Write (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 09 Sep 2026; federal remediation due 23 Sep 2026. CISA entry
- Vendor
- Google · Chromium V8 (CISA)
References on the NVD record
Reporting that names this identifier
- CISA Adds Four Known Exploited Vulnerabilities to Catalog — CISA, 23 hr ago
- Chrome V8 Zero-Day Exploited in the Wild Enables Code Execution Inside Sandbox — The Hacker News, 1 d ago
- Google fixes yet another actively exploited Chrome zero-day (CVE-2026-87491) — Help Net Security, 1 d ago
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.