Google has released two significant security updates for Chrome in October 2026, collectively addressing 47 vulnerabilities across Windows, Mac and Linux systems.
The first update, released on 13 October 2026, fixes 37 security flaws, seven of them critical
, whilst
a second update announced on 15 October 2026
addresses
one critical, six high-severity, and three medium-severity vulnerabilities
. For Kent SMEs relying on Chrome for daily business operations—from web applications to cloud services—these updates require immediate attention to prevent potential security breaches.
Google Chrome October 2026 Security Updates: The Vulnerability Landscape
Google’s October 2026 Chrome security update moves desktop Chrome to 155.0.8059.79/.80 on Windows and Mac and 155.0.8059.79 on Linux and Android, released on 13 October 2026, fixing 37 security flaws, seven of them critical
. The severity breakdown includes seven critical vulnerabilities, 29 high-severity issues, and one medium-severity flaw.
Six of the seven critical bugs are use-after-free memory errors, whilst the seventh is a buffer overflow in ANGLE, Chrome’s graphics layer
. These memory corruption vulnerabilities are particularly concerning because they can potentially allow attackers to execute arbitrary code on affected systems.
The second update, released just two days later, addresses an additional 10 vulnerabilities.
The most serious issue is CVE-2026-110922, a critical use-after-free flaw in Chrome’s Prerender feature, with Google crediting Xinyang Ge with reporting it on 2 October
. Notably,
one high-severity DOM memory corruption flaw was reported by Xinyang Ge of Anthropic with assistance from Claude AI
, highlighting how artificial intelligence is increasingly being used to identify security vulnerabilities.
Why These Chrome Vulnerabilities Matter for Kent SMEs
Chrome remains the dominant browser in UK business environments, making these vulnerabilities particularly significant for Kent SMEs. The critical memory corruption flaws could allow attackers to execute malicious code simply by directing employees to specially crafted websites. This attack vector requires no technical knowledge from the victim—merely visiting a compromised or malicious website whilst using an unpatched Chrome browser could be sufficient for an attack.
For businesses using Chrome to access cloud applications, web-based email, accounting systems, or customer relationship management platforms, browser security is foundational to overall IT security. A compromised browser can provide attackers with access to session cookies, stored passwords, and sensitive business data.
Fortunately,
neither company says any of these bugs is being exploited
, meaning this is not an emergency zero-day situation like the actively exploited vulnerabilities in Microsoft’s October 2026 Patch Tuesday. However, the public disclosure of these vulnerabilities means attackers now have the information needed to develop exploits, making prompt patching essential.
What Kent SMEs Must Do This Week
Update All Chrome Installations Immediately
Chrome typically updates automatically, but
Google says the update “will roll out over the coming days/weeks,” so your copy might not have it yet
. Kent SMEs should not wait for the gradual rollout—instead, take these immediate steps:
- Open Chrome and navigate to Settings > About Chrome (or chrome://settings/help in the address bar)
- Chrome will check for updates automatically when you open this page
- Verify you are running version 155.0.8059.79 or later (155.0.8059.80 on some Windows and Mac systems)
- Click “Relaunch” to complete the update—this step is essential as the security patches only become active after restart
Check the browser’s About Google Chrome page and restart it if prompted to complete installation
. Simply downloading the update is insufficient; Chrome must be restarted for the security patches to take effect.
Update Chrome Across All Devices and Operating Systems
The October 2026 Chrome security updates affect Windows, Mac, Linux and Android devices. Kent SMEs must ensure that Chrome is updated across:
- Desktop computers (Windows, Mac, Linux)
- Laptops used for remote working
- Android mobile devices and tablets
- Any servers running Chrome or Chromium-based applications
For businesses with multiple devices, consider deploying Chrome updates through group policy or mobile device management solutions to ensure comprehensive coverage. This is particularly important for remote workers who may not be connecting to the office network regularly.
Consider Chrome Enterprise for Centralized Management
Kent SMEs struggling to maintain consistent browser updates across multiple devices should evaluate Chrome Enterprise, which provides centralized policy management and update controls. This allows IT administrators to ensure that security updates are deployed organisation-wide without relying on individual users to update their browsers.
Review Other Browser Security in Your Environment
Many organisations use multiple browsers.
Mozilla shipped Firefox 158 the same day with 77 security fixes (30 rated high)
, indicating that October 2026 saw significant browser security activity across multiple platforms. Kent SMEs should ensure all browsers in their environment—Firefox, Edge, Safari—are fully updated.
Microsoft Edge, which is based on Chromium (the same foundation as Chrome), will eventually receive equivalent security patches.
Microsoft Edge hadn’t shipped its matching fix as of 15 October
, so Edge users should monitor for updates and apply them promptly when available.
Broader Browser Security Considerations for Kent SMEs
Implement Browser Extension Controls
Whilst updating Chrome addresses these specific vulnerabilities, browser security extends beyond patching. Kent SMEs should implement policies controlling which browser extensions employees can install, as malicious or poorly coded extensions can introduce security risks even on fully patched browsers.
Enable Automatic Updates by Default
Chrome’s automatic update mechanism is one of its strongest security features. Ensure that automatic updates are not disabled by group policy or user settings. For businesses requiring testing before updates, establish a rapid testing and deployment cycle—waiting weeks to deploy browser security updates significantly increases risk.
Consider the Broader Security Context
Browser patching is just one component of comprehensive security. The 83% of UK SME cyber incidents still caused by phishing demonstrates that technical controls must be complemented by user awareness. Similarly, ensuring that Cyber Essentials certification requirements are met provides a framework for holistic security including browser management.
Coordinate Browser Updates with Other October 2026 Patches
October 2026 has been an exceptionally busy month for security updates. Kent SMEs should coordinate Chrome updates with other critical patches, including the record-breaking Microsoft October 2026 Patch Tuesday and address the record 2,627 ransomware incidents in Q3 2026 by maintaining a comprehensive, up-to-date security posture.
How Meridian Micro Can Help Kent SMEs Maintain Browser Security
Managing security updates across multiple devices, browsers, and platforms can overwhelm small IT teams or businesses without dedicated IT staff. Meridian Micro provides comprehensive IT support for Kent SMEs, including proactive patch management, browser security configuration, and centralised update deployment.
Our managed IT services ensure that critical security updates—including browser patches, operating system updates, and application security fixes—are deployed promptly across your entire IT environment. We monitor for new vulnerabilities, test updates in controlled environments, and deploy them systematically to minimise business disruption whilst maximising security.
Don’t let browser security vulnerabilities expose your Kent business to unnecessary risk. Contact Meridian Micro today on 01303 883111 to discuss how our managed IT support services can maintain your security posture, ensure timely patching, and provide the expert guidance your business needs to stay protected in an increasingly complex threat landscape.