Google Chrome: Race condition in Fonts enables sandbox escape
Summary
A race condition in the Fonts component of Google Chrome before 155.0.8059.39 can be triggered by a remote attacker using a crafted HTML page. The attacker must first have compromised the renderer process, after which the flaw can allow code execution outside the browser sandbox. Chromium rates the issue Medium, while NVD scores it 8.3 (High).
Affected
- Google Chrome before 155.0.8059.39 (per CVE description)
Fixed in
- Google Chrome 155.0.8059.39 (Windows and Mac 155.0.8059.39/.40, Linux 155.0.8059.39)
- Later Chrome 155 stable builds also include the fix; install the newest stable release
Workaround
Unknown. No vendor workaround is documented. Installing the fixed version is the remedy.
Exploitation
- Not known to be exploited in the wild; not listed in the CISA KEV catalog.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- No public exploit known.
Our recommendation
- Verify that all Chrome installations run the current stable build and that automatic updates are enabled.
- Check versions centrally, e.g. with Chrome Browser Cloud Management or group policy.
- Restart the browser after updating.
- Monitor for unusual browser crashes or unexpected processes on endpoints.
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
- OSV (Debian) osv.dev
- CIS advisory www.cisecurity.org
- VulDB entry vuldb.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, 14:11.
Original description (NVD)
Race condition in Fonts in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process 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.