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CVE-2026-85046: Google Chromium V8 Type Confusion Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-09-04
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-03 · updated 2026-09-21
• Weakness: CWE-843

Description

Type confusion in V8 in Google Chrome prior to 152.0.7977.82 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

Affected products

• Google Chrome: before 152.0.7977.82 — fixed in 152.0.7977.82
• Google V8: before 15.3.48 — fixed in 15.3.48

How to fix

Upgrade to a fixed version: Google Chrome 152.0.7977.82; Google V8 15.3.48. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.html
• https://issues.chromium.org/issues/542403045
• https://github.com/Serotav/Writeups/blob/77556c57999805fa7815a114da51d91cf24fbea9/v8/When_Sorting_Leads_To_Confusion.md
• https://github.com/v8/v8/commit/e0562d87ad9c17042b581582c99237d798572e67
• https://news.ycombinator.com/item?id=49570669
• https://serotav.github.io/Writeups/v8/when-sorting-leads-to-confusion/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85046

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