Google Chrome: Memory corruption in Extensions allows sandbox code execution
Summary
Google Chrome before 156.0.8078.47 contains a memory corruption flaw in its Extensions component (CWE-119). A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The attack requires no account, but the victim must open the malicious page. The CVSS base score is 8.8, while Chromium rates the issue Medium; the description does not report a full system compromise.
Affected
- Google Chrome desktop builds before 156.0.8078.47
- Chromium-based products that consume the same fix, such as Microsoft Edge (see vendor advisories; Edge reportedly requires 156.0.4314.42 or later)
- Android: unknown
Fixed in
- Google Chrome 156.0.8078.47 or later (per-platform build for Windows and macOS to be verified against the Chrome Releases post; secondary sources differ between .47 and .48)
- Microsoft Edge 156.0.4314.42 or later (according to a HKCERT bulletin)
Workaround
Unknown. No vendor-documented interim mitigation was found. The fix is to update the browser.
Exploitation
- No known exploitation in the wild at the time of research
- No public proof of concept found
- CISA SSVC assessment: exploitation poc, automatable no, technical impact total
Our recommendation
- Verify the Chrome version on all endpoints and update to 156.0.8078.47 or later (check the vendor's Windows and macOS build)
- Enforce automatic updates or a managed update policy
- Verify Microsoft Edge is at 156.0.4314.42 or later
- Review installed browser extensions and remove unused ones
- Patch within the normal browser update timeline; no emergency action is indicated because no exploitation is known
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 msrc.microsoft.com
- HKCERT security bulletin for Microsoft Edge www.hkcert.org
- Vulners CVE record 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, 13:56.
Original description (NVD)
Memory corruption in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to 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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