Google Chrome: Use-after-free in Extensions allows code execution in sandbox
Summary
Google Chrome versions prior to 156.0.8078.47 contain a use-after-free flaw in the Extensions component. A remote attacker can use a crafted HTML page to execute arbitrary code inside the browser sandbox. The victim must open the malicious page, and no privileges or exposed services are required.
Affected
- Google Chrome desktop prior to 156.0.8078.47
- Chromium-based Microsoft Edge prior to 156.0.4314.42 (according to HKCERT, unverified)
- Linux distributions shipping Chromium packages (versions unknown)
Fixed in
- Google Chrome 156.0.8078.47 or later (Linux: 156.0.8078.47; Windows/macOS: 156.0.8078.48 according to secondary sources)
- Microsoft Edge 156.0.4314.42 or later (according to HKCERT)
- Linux distributions: check the vendor advisories for fixed package versions
Workaround
No workaround documented. Updating to a fixed build is the only confirmed mitigation.
Exploitation
- No evidence of exploitation in the wild found; CISA KEV status not verified
- No public proof of concept found
- CISA SSVC: exploitation none, automatable no, technical impact total
Our recommendation
- Update all Chrome and Edge installations to the latest stable build, not only to 156.0.8078.47
- Verify browser versions centrally, especially where automatic updates are disabled or managed
- Check Linux and snap-based Chromium installations against their distribution advisories
- Monitor CISA KEV and the Chromium issue tracker for exploitation evidence
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
- Vulners CVE listing vulners.com
- VulDB entry vuldb.com
- HKCERT security bulletin (Microsoft Edge) www.hkcert.org
- Ubuntu CVE tracker ubuntu.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, 13:10.
Original description (NVD)
Use after free 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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