Google Chrome: Incorrect authorization in Mojo allows sandbox escape
Summary
Google Chrome on Windows contains an incorrect authorization flaw in Mojo, Chrome's inter-process communication framework. A local attacker running a local program could potentially execute arbitrary code outside the browser sandbox. The attack requires local access and a program already running on the system, so it is not remotely exploitable. The CNA rates the Chromium security severity as High, with a CVSS v3.1 base score of 8.6.
Affected
- Google Chrome on Windows before 155.0.8059.79
- Exact affected range according to the CVE record: 155.0.8059.79 to < 155.0.8059.79
Fixed in
- Google Chrome 155.0.8059.79 or later for Windows (Stable channel update of October 13, 2026)
Workaround
Unknown.
Exploitation
- No evidence of exploitation in the wild found in the sources.
- CISA SSVC assessment: Exploitation none, Automatable no, Technical Impact total.
- No public proof of concept found.
Our recommendation
- Update Google Chrome on all Windows endpoints to 155.0.8059.79 or later and verify the version under chrome://settings/help.
- Check that automatic updates work and that no endpoint remains on an older version.
- Patch the whole Chrome release, as it fixes further security issues.
- Monitor endpoints for unexpected local programs, as this flaw requires one.
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
- CVE record mirror (threatint) cve.threatint.com
- Debian OSV entry osv.dev
- Ubuntu security notice ubuntu.com
- VulDB entry vuldb.com
- SecurityOnline: Chrome 155 security update securityonline.info
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, 08:17.
Original description (NVD)
Incorrect authorization in Mojo in Google Chrome on on Windows prior to 155.0.8059.79 allowed a local attacker to potentially execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)
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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