CVE-2026-85046
Published 2026-09-03 · Updated 2026-09-21 · Source chrome-cve-admin@google.com
Summary
CVE-2026-85046 is a high-severity (CVSS 8.8) vulnerability in Google Chromium V8. CISA added it to the Known Exploited Vulnerabilities catalog on September 4, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 18, 2026. CISA does not currently list it as used in ransomware campaigns. Google has 75 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 75 known-exploited Google vulnerabilities →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)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Google — Chromium V8
Name: Google Chromium V8 Type Confusion Vulnerability
Date added: 2026-09-04 · Due: 2026-09-18
Required action: 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.
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

