Google Chrome: Missing authorization in WebAppInstalls
Summary
Missing authorization in the WebAppInstalls feature of desktop Google Chrome before 155.0.8059.39 can be abused by an attacker who has already compromised the renderer process. With social engineering and a crafted HTML page, the attacker could potentially execute arbitrary code outside the browser sandbox. The attack is a chained scenario that requires a prior renderer compromise and user interaction, and Google rates the issue Medium.
Affected
- Google Chrome desktop prior to 155.0.8059.39 (CVE record and OSV)
- Windows, macOS and Linux builds are affected
- Ubuntu lists its chromium-browser package as not affected; snap-based Chromium must be checked separately
Fixed in
- 155.0.8059.39 (6 October 2026 stable release, per press coverage; vendor advisory not verified)
- Later Chrome 155 point releases exist; install the latest stable build
Workaround
Unknown. No vendor-documented workaround found. Enterprise policies that restrict WebAppInstalls were not verified.
Exploitation
- Not marked as known exploited; not listed in CISA KEV
- CISA SSVC: exploitation none, automatable no
- No public proof of concept found in our searches (not exhaustive)
- EPSS about 0.004 (low)
Our recommendation
- Verify that all Chrome installations (Windows, macOS, Linux) run the latest Chrome 155 stable build
- Check managed installations for update policies that block updates
- Check Chromium builds from Linux distributions and snaps separately
- Keep auto-update enabled and monitor for further Chrome security updates
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
- OSV: DEBIAN-CVE-2026-106194 osv.dev
- Ubuntu security: CVE-2026-106194 ubuntu.com
- OpenCVE: CVE-2026-106194 app.opencve.io
- CISA ADP Vulnrichment (HOL Guard mirror) hol.org
- Malwarebytes: Update Chrome and ChromeOS www.malwarebytes.com
- GitHub tracker (KEV status) github.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 1 Nov 2026, 14:13.
Original description (NVD)
Missing authorization in WebAppInstalls in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process and leveraged social engineering 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.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.