Google Chrome: Race condition in font handling allows code execution outside sandbox
Summary
A race condition in the font handling of Google Chrome before 155.0.8059.39 can be exploited by a remote attacker via a crafted HTML page. Successful exploitation may allow arbitrary code execution outside the browser sandbox. The attack requires the victim to open the malicious page, for example through phishing or a compromised website. Google rates the issue as High severity, and no exploitation in the wild is known.
Affected
- Google Chrome Stable for Linux before 155.0.8059.39
- Google Chrome Stable for Windows and Mac before 155.0.8059.39/.40 (according to the MS-ISAC advisory)
- CVSS 3.1: 8.3 (High), AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Fixed in
- Google Chrome 155.0.8059.39 for Linux
- Google Chrome 155.0.8059.39/.40 for Windows and Mac
- Vendor source: Google Chrome Releases, Stable Channel Update for Desktop, October 6, 2026
Workaround
Unknown. No workaround was found in the sources. Updating is the only documented mitigation.
Exploitation
- No reports of exploitation in the wild (MS-ISAC).
- CISA SSVC in the CVE record: exploitation none, automatable no.
- No public proof of concept found.
- Not in CISA KEV according to a third-party tracker; not verified against the CISA catalogue.
Our recommendation
- Check the Chrome version on all endpoints. Windows, Mac and Linux have different fixed builds.
- Update Chrome to 155.0.8059.39 or later (Linux) or 155.0.8059.39/.40 or later (Windows, Mac).
- Confirm that automatic updates work on managed devices and that no system remains on an older build.
- Treat this as a standard priority patch, unless the fleet is significantly outdated.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Google Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker issues.chromium.org
- MS-ISAC/CIS advisory: Multiple vulnerabilities in Google Chrome www.cisecurity.org
- OpenCVE: CVE-2026-106426 app.opencve.io
- SUSE CVE via Vulners: CVE-2026-106426 vulners.com
- Strix: CVE-2026-106377 (sibling CVE, renderer precondition) www.strix.ai
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, 14:02.
Original description (NVD)
Race condition in Fonts in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (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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