Google Chrome: Use-after-free in SiteIsolation
Summary
Google Chrome before 156.0.8078.47 contains a use-after-free flaw in SiteIsolation, the component that isolates websites in separate processes. A remote attacker can use a crafted HTML page to potentially execute arbitrary code inside the renderer sandbox. The attack requires a user to open the malicious page, and a full compromise would normally also need a sandbox escape, which is not confirmed for this CVE.
Affected
- Google Chrome desktop for Linux before 156.0.8078.47
- Google Chrome desktop for Windows and macOS before 156.0.8078.48 (build details not verified against the vendor post)
- Google Chrome for Android before 156.0.8078.47
- Chromium-based browsers, such as Microsoft Edge, until they include the fix
Fixed in
- Windows and macOS: 156.0.8078.48 (20 October 2026)
- Linux and Android: 156.0.8078.47 (20 October 2026)
Workaround
- No vendor workaround documented. Install the update and restart the browser.
- Until patched, limit browsing to trusted sites.
Exploitation
- CISA SSVC: Exploitation none, automatable no, technical impact total.
- No known exploitation in the wild.
- No public proof of concept found.
Our recommendation
- Update Chrome and all Chromium-based browsers to the fixed versions on all workstations.
- Restart the browser after the update, because a pending update does not patch the running process.
- Verify the installed version on each endpoint, not only the update notice.
- Handle this together with the wider Chrome 156 security update, which fixes 353 issues.
- Check Linux distribution packages (e.g. Debian, Ubuntu snap) separately.
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 entry issues.chromium.org
- Ubuntu security tracker: CVE-2026-113079 ubuntu.com
- Vulners CVE record: CVE-2026-113079 vulners.com
- VulDB entry (severity discrepancy) vuldb.com
- Cybersecurity News: Chrome 156 security update cybersecuritynews.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, 14:17.
Original description (NVD)
Use after free in SiteIsolation 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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