Google Chrome: Buffer overflow in Fonts component allows sandbox escape
Summary
A buffer overflow in the Fonts component of Google Chrome before 155.0.8059.39 can be triggered by a crafted HTML page. An attacker must first have compromised the renderer process, so this flaw is a second stage in an attack chain. If the chain succeeds, the attacker could potentially execute arbitrary code outside the browser sandbox. The user must visit the crafted page.
Affected
- Google Chrome prior to 155.0.8059.39
Fixed in
- Google Chrome 155.0.8059.39 or later. Newer Stable builds are available; install the current Stable version.
Workaround
Unknown.
Exploitation
- No evidence of exploitation in the wild.
- CISA SSVC: exploitation none, automatable no.
- EPSS 0.00332 (below 1%).
- No public proof of concept found.
Our recommendation
- Update Google Chrome to the current Stable version on all workstations.
- Confirm that other Chromium-based browsers (for example Microsoft Edge, Brave) and embedded Chromium applications are patched, and check with their vendors.
- Enforce automatic updates through group policy or MDM.
- Check for machines that have not been restarted or updated for a long time.
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 entry issues.chromium.org
- OSV: DEBIAN-CVE-2026-106292 osv.dev
- Vulners: MS:CVE-2026-106292 vulners.com
- BleepingComputer: Google releases Chrome 155 www.bleepingcomputer.com
- WindowsForum: Chrome 155.0.8059.79/.80 security update windowsforum.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, 14:07.
Original description (NVD)
Buffer overflow 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.
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