Google Chrome: Type confusion in V8 JavaScript engine allows sandboxed code execution
Summary
A type confusion in the V8 JavaScript engine of Google Chrome prior to 157.0.8103.50 allows a remote attacker to execute arbitrary code inside the browser sandbox. The victim must load a crafted HTML page, for example via a phishing link or a compromised website, and no authentication is required. Code execution is limited to the sandbox; a further vulnerability is usually needed to compromise the operating system.
Affected
- Google Chrome prior to 157.0.8103.50 (Windows, macOS, Linux)
Fixed in
- Google Chrome 157.0.8103.50 or later on Linux
- Google Chrome 157.0.8103.51 (Windows, macOS; vendor shipped builds 157.0.8103.50/.51)
Workaround
- Unknown. No vendor workaround was identified; the fix is to update.
- Restart the browser after updating, as the fix only takes effect after a restart.
Exploitation
- Not confirmed as exploited in the wild at the time of research.
- No public proof-of-concept found.
- Not listed in CISA KEV in the sources reviewed.
- CISA SSVC assessment: exploitation none, not automatable.
- Google's release notes flag a different bug (CVE-2026-125350) as exploited.
Our recommendation
- Update Chrome on all Windows, macOS and Linux endpoints to the fixed version and verify the installed version.
- Make sure users restart the browser so the update takes effect.
- Check managed browsers and remind users to avoid unknown links and attachments.
- Monitor for reports of further exploitation, as this CVE was published on 10 November 2026.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop (9 Nov 2026) chromereleases.googleblog.com
- Chromium issue tracker entry (referenced by CVE record) issues.chromium.org
- CVE record mirror CVE-2026-125344 cve.threatint.com
- Cryptika: Google Chrome 0-day vulnerability report www.cryptika.com
- OffSeq Radar: CVE-2026-125344 threat entry radar.offseq.com
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 11 Nov 2026, 00:11.
Original description (NVD)
Type confusion in V8 in Google Chrome prior to 157.0.8103.50 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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