Summary
generated automatically from NVD dataCVE-2026-87491 is an out-of-bounds write (CWE-787) in the V8 engine of Google Chrome, affecting versions prior to 153.0.8010.36. A remote attacker could use a crafted HTML page to execute arbitrary code inside the browser sandbox. The flaw is listed in the CISA KEV catalog, meaning it is actively exploited, and carries a CVSS v3.1 score of 8.8 (HIGH), though Chromium rates its own severity as Medium.
NVD description
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)
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-09-09. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-09-23
EPSS · FIRST.org
3.1%probability of exploitation in the next 30 days
Higher than 87% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-19, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 9 sept. 2026
- Updated
- 21 sept. 2026
- Status
- Analyzed
- Source
- chrome-cve-admin@google.com
Affected products
Weaknesses (CWE)
References (3)
- https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.htmlRelease NotesVendor Advisory
- https://issues.chromium.org/issues/543557673Permissions Required
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87491US Government Resource
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