Google Chrome: Improper input validation in V8 allows sandboxed code execution
Summary
Improper input validation in the V8 JavaScript engine of Google Chrome before 156.0.8078.79 can be abused by a remote attacker to potentially execute arbitrary code inside the browser sandbox. The attacker needs a user to visit a crafted HTML page, for example via a phishing link or a compromised website. According to the CNA, the impact is limited to the sandbox; full system compromise would normally require an additional sandbox escape.
Affected
- Google Chrome prior to 156.0.8078.79
- Linux, Windows and macOS builds of Chrome are covered by the vendor's update of 29 October 2026
Fixed in
- Google Chrome 156.0.8078.79 or higher (Windows/macOS: 156.0.8078.79/.80; Linux: 156.0.8078.79)
- Some third-party package sources may still show older builds; verify the installed version directly
Workaround
- No workaround documented; the fix is a browser update
- Automatic updates apply the fix after a browser restart
Exploitation
- CISA KEV: not listed
- Public proof of concept: none found at the time of research
- In the wild: unknown; no report of exploitation found
- EPSS: 0.24 % (percentile 15)
Our recommendation
- Update Google Chrome to 156.0.8078.79 or higher on all endpoints and verify the installed version centrally
- Force a browser restart on devices where Chrome stays open for long periods
- Apply the whole Chrome update, as the release contains further security fixes
- Treat the update as high priority within the normal update cycle, and check the update has reached all devices within a few days
- Remind users not to open untrusted links and to report suspicious web pages
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker issues.chromium.org
- OffSeq Radar: CVE-2026-119262 radar.offseq.com
- VulDB: CVE-2026-119262 vuldb.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 31 Oct 2026, 08:57.
Original description (NVD)
Improper input validation in V8 in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to potentially 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.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.