Google Chrome: Missing authorization in FullScreen component
Summary
A missing authorization check in the FullScreen component of Google Chrome before 155.0.8059.39 allows a remote attacker to bypass system access restrictions. The attacker must first have compromised the renderer process, usually through another vulnerability, and then use social engineering to get the user to open a crafted HTML page. NVD lists a CVSS score of 8.3, while Google rates the issue Medium in its Chromium severity scale.
Affected
- Google Chrome before 155.0.8059.39 (per CVE record)
- Chromium-based Microsoft Edge before 155.0.4283.62 (reported)
Fixed in
- Google Chrome 155.0.8059.39 or later (desktop: Windows, macOS, Linux)
- Microsoft Edge 155.0.4283.62 or later (reported)
- Later Chrome 155 builds also contain the fix; install the newest stable release.
Workaround
Unknown.
- No vendor workaround known; apply the update.
Exploitation
- Not listed in CISA KEV; CISA ADP data does not mark it as known exploited.
- CISA SSVC: exploitation none, not automatable, total technical impact.
- No public proof of concept found in searches (provisional).
Our recommendation
- Update Google Chrome and other Chromium-based browsers such as Edge to the latest stable release on all workstations.
- Check update status on devices that are rarely restarted.
- Keep automatic browser updates enabled.
- Install all other Chrome 155 security fixes at the same time, since this issue is typically part of an attack chain.
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
- Malwarebytes: Update Chrome and ChromeOS to fix critical security issues www.malwarebytes.com
- HKCERT: Microsoft Edge multiple vulnerabilities www.hkcert.org
- OpenCVE: CVE-2026-106363 app.opencve.io
- Ubuntu security: CVE-2026-106363 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 1 Nov 2026, 14:06.
Original description (NVD)
Missing authorization in FullScreen in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass system access restrictions 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.
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