Google Chrome: Use-after-free in Core allows remote code execution
Summary
A use-after-free flaw in the Core component of Google Chrome desktop allows a remote attacker to execute arbitrary code outside the browser sandbox. The attacker only needs to lure a user to a crafted HTML page, so no login or prior access is required. The CVSS 3.1 base score is 9.6 (Critical) and Chromium rates the issue High.
Affected
- Google Chrome desktop versions before 155.0.8059.39
- Downstream Chromium builds that include the vulnerable Core code, such as Debian, SUSE and Chainguard packages before their fixed versions
Fixed in
- Google Chrome 155.0.8059.39 (Linux) and 155.0.8059.39/.40 (Windows and Mac), per Google's Stable Channel Update of October 6, 2026
- Debian 155.0.8059.39-1~deb12u1
- Chainguard chromium 155.0.8059.39-r0
- Microsoft Edge (Chromium) 155.0.4283.62 per Tenable
Workaround
No workaround known. Update the browser to a fixed build.
Exploitation
- No evidence of in-the-wild exploitation found in the sources reviewed.
- No public proof of concept found for this CVE.
- CISA SSVC assessment: Exploitation none, Automatable no, Technical Impact total.
- Third-party data indicates it is not in the CISA KEV catalog; verify this on cisa.gov before closing the item.
Our recommendation
- Update Google Chrome to 155.0.8059.39 or later (or a current 156.x build) on all workstations, prioritising users who browse untrusted sites.
- Check the whole fleet for the installed Chrome version and confirm the rollout.
- Update other Chromium-based browsers and embedded Chromium components (such as Electron apps) once their vendors ship fixed builds.
- Monitor for exploitation news and re-check the CISA KEV catalog.
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
- OSV: DEBIAN-CVE-2026-106227 osv.dev
- Tenable plugin 366658 (Microsoft Edge) www.tenable.com
- Vulners: SUSE CVE record vulners.com
- Vulners: Chainguard CVE record vulners.com
- Malwarebytes: Chrome security updates October 2026 www.malwarebytes.com
- GitHub alert feed for CVE-2026-106227 github.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 30 Oct 2026, 23:21.
Original description (NVD)
Use after free in Core in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to 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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