Google Chrome: Improper input validation in Extensions allows sandbox code execution
Summary
Improper input validation in the Extensions component of desktop Google Chrome allows a remote attacker to potentially execute arbitrary code inside the browser sandbox. The attacker needs the victim to open a crafted HTML page, and the CVSS score is 8.8 (high). Code execution inside the sandbox alone does not give full control of the system, but it is a serious browser flaw. No exploitation or public proof-of-concept was found in the sources reviewed.
Affected
- Desktop Google Chrome builds before 156.0.8078.47 on Linux
- Desktop Google Chrome builds before 156.0.8078.47 or 156.0.8078.48 on Windows and macOS
- Secondary sources report conflicting ranges; rely on Google's advisory for the exact version list
Fixed in
- Linux: 156.0.8078.47 or later
- Windows and macOS: 156.0.8078.47 or 156.0.8078.48 or later
- Microsoft Edge and Chromium-based builds: fixed build unknown; check the vendor advisory
Workaround
No workaround is needed once the update is installed. Until then, restrict installation of extensions via Chrome Enterprise policies and remove unneeded extensions (our suggestion, not from a source).
Exploitation
- CISA SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total
- No public proof-of-concept found
- Not listed as known exploited in the sources reviewed
Our recommendation
- Update desktop Chrome to 156.0.8078.47 or later (156.0.8078.48 or later on Windows and macOS)
- Fully relaunch the browser after updating so the new version is running
- Check the browser version on all endpoints, including managed fleets
- Confirm the fixed Edge and Chromium builds against their own advisories
- Limit extensions to those that are needed
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 477664550 issues.chromium.org
- Microsoft Security Update Guide: CVE-2026-113231 msrc.microsoft.com
- VulDB: CVE-2026-113231 vuldb.com
- Cybersecurity News: Chrome security update fixing 353 flaws cybersecuritynews.com
- Vulners: NVD record CVE-2026-113231 vulners.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, 12:48.
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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