Google Chrome: Improper input validation in Extensions
Summary
Google Chrome for desktop contains an improper input validation flaw in the Extensions component. A remote attacker can potentially execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. Google rates the severity as Medium, while the CVSS base score is 8.8; a second flaw would normally be needed to escape the sandbox for full system compromise (analyst assessment).
Affected
- Google Chrome prior to 156.0.8078.47
- Android Chrome builds before 156.0.8078.47 (third-party source, not verified)
Fixed in
- Google Chrome 156.0.8078.47 or later (per CVE description; verify the build numbers on the Chrome Releases page)
Workaround
- None documented by the vendor. Installing the fixed build is the remedy.
Exploitation
- No evidence of exploitation or public proof of concept found at the time of research.
- A third-party alert reports the CVE is not listed in CISA KEV; the catalogue was not checked directly.
Our recommendation
- Update Google Chrome to 156.0.8078.47 or later on all desktop systems and check the current stable version on the Chrome Releases page.
- Restart the browser after updating, as old browser processes may still run.
- Check Microsoft Edge and Linux Chromium packages for their fixed builds.
- Restrict extension installs to an approved list via enterprise policy until all systems are patched.
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
- Microsoft Security Update Guide: CVE-2026-113264 msrc.microsoft.com
- Strix: CVE-2026-113264 www.strix.ai
- Ubuntu security: CVE-2026-113264 ubuntu.com
- VulDB: CVE-2026-113264 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, 12:25.
Original description (NVD)
Improper input validation in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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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