Google Chrome: Type confusion in V8 allows code execution in sandbox
Summary
Google Chrome prior to 155.0.8059.39 contains a type confusion flaw in the V8 JavaScript engine (CWE-843). A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The attack requires that the user visits the page, for example via a link in email or chat. Code execution is limited to the sandbox; the advisory does not describe a sandbox escape.
Affected
- Google Chrome versions prior to 155.0.8059.39 (CVE description)
- Chrome desktop builds on Windows, Mac and Linux are affected
Fixed in
- Chrome 155.0.8059.39 (Linux) and 155.0.8059.39/.40 (Windows, Mac), Stable update of 6 October 2026
- Recommended: Chrome 155.0.8059.79 or newer (Stable update of 13 October 2026 includes the earlier fix)
Workaround
Unknown. No vendor workaround found; patching is the mitigation.
Exploitation
- CISA SSVC: exploitation none, not automatable, total technical impact
- Not listed in the CISA KEV catalogue; no public proof of concept found in research
- Google reports no attacks in the wild in the primary advisory (not confirmed in the primary post; secondary reports only)
Our recommendation
- Inventory Chrome versions on all endpoints and flag anything below 155.0.8059.79
- Update Chrome to 155.0.8059.79 or newer within the normal browser patch cycle (within days)
- Check Microsoft Edge and other Chromium-based browsers for updates as well
- Enable automatic updates and restart the browser after patching
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop (6 October 2026) chromereleases.googleblog.com
- OSV: DEBIAN-CVE-2026-106240 osv.dev
- Malwarebytes: Update Chrome and ChromeOS to fix critical security issues www.malwarebytes.com
- Malwarebytes: Chrome update fixes 37 security flaws, including seven critical bugs www.malwarebytes.com
- OpenCVE: CVE-2026-106240 app.opencve.io
- CISA ADP Vulnrichment summary (HOL Guard) hol.org
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 22:07.
Original description (NVD)
Type confusion in V8 in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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