Google Chrome: Memory corruption in WebAppInstalls allows sandbox escape
Summary
Google Chrome desktop versions before 156.0.8078.47 contain a memory corruption flaw in the WebAppInstalls component. A remote attacker who lures a user to a crafted HTML page may be able to execute arbitrary code outside the browser sandbox. The attack requires user interaction (opening the page) but no login.
Affected
- Google Chrome desktop stable builds before 156.0.8078.47 (per NVD description)
- Chromium-based browsers that consume the fix, such as Microsoft Edge (exact build to be confirmed in MSRC advisory)
- Unknown: exact Windows and macOS build number (156.0.8078.47 or 156.0.8078.48 reported by different sources)
Fixed in
- Chrome 156.0.8078.47 or later (Windows and macOS: confirm the exact build against the Chrome Releases advisory)
- Edge: see Microsoft MSRC advisory for the fixed version
- Linux distributions: see vendor advisories (Debian DSA 6577-1 and DLA 4853-1 reported)
Workaround
- No vendor workaround documented. Updating the browser and restarting it is the remedy.
Exploitation
- No known exploitation in the wild per available sources.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- No public proof-of-concept found.
- Chromium rates the bug Medium; the NVD CVSS 3.1 score is 9.6 (Critical).
Our recommendation
- Inventory all Chrome, Edge and other Chromium-based browsers, including Linux and Android devices.
- Update to Chrome 156.0.8078.47 or later and restart the browser; prioritise managed endpoints within days.
- Check the MSRC advisory for Edge and vendor advisories for Linux systems.
- Tighten phishing controls and restrict browsing to trusted sites where possible until patching is complete.
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 MSRC update guide msrc.microsoft.com
- Ubuntu CVE tracker ubuntu.com
- NVD record via vulners 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 30 Oct 2026, 22:33.
Original description (NVD)
Memory corruption in WebAppInstalls in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside 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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