CVE-2026-85046
Google Chromium V8 Type Confusion Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 18 September 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.26% probability · 68th percentile
- CISA KEV
- Listed 4 September 2026 · due 18 September 2026
- Weakness
- CWE-843
- Affected
- google/chrome · google/v8
- Source
- chrome-cve-admin@google.com
CISA notes
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. https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.html ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-85046
References
- https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_01882797386.htmlRelease Notes, Vendor Advisory
- https://issues.chromium.org/issues/542403045Permissions Required
- https://github.com/Serotav/Writeups/blob/77556c57999805fa7815a114da51d91cf24fbea9/v8/When_Sorting_Leads_To_Confusion.mdExploit, Third Party Advisory
- https://github.com/v8/v8/commit/e0562d87ad9c17042b581582c99237d798572e67Patch
- https://news.ycombinator.com/item?id=49570669Issue Tracking, Third Party Advisory
- https://serotav.github.io/Writeups/v8/when-sorting-leads-to-confusion/Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85046US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.