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
- 1.81% probability · 79th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 4 September 2026 · due 18 September 2026
- Weakness
- CWE-843
- Affected
- google/chrome · google/v8
- Source
- chrome-cve-admin@google.com
EPSS moved from 48.9% on 24 September 2026 to 1.8% on 29 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
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, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.