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Chrome Security Update Patches Background Fetch API Vulnerability

Chrome versions 144.0.7559.109 and 144.0.7559.110 have been released to the stable channel, addressing a critical security vulnerability in the Background Fetch API.

JBy Jason FordJan 28, 20262 min read

Chrome versions 144.0.7559.109 and 144.0.7559.110 have been released to the stable channel, addressing a critical security vulnerability in the Background Fetch API.

The update is rolling out across Windows, Mac, and Linux systems over the coming days and weeks. Users are advised to ensure their browsers are fully updated.

The security fix addresses CVE-2026-1504, a high-severity vulnerability affecting the Background Fetch API implementation. This vulnerability was identified as an inappropriate implementation that could be exploited by threat actors.

CVE ID Vulnerability CVSS Score Component Reporter Bounty Status

CVE-2026-1504 Inappropriate implementation in Background Fetch API 7.5 Background Fetch API Luan Herrera (@lbherrera_) $3,000 Fixed in 144.0.7559.109/.110

The issue was discovered and reported by security researcher Luan Herrera on January 9, 2026, and has been awarded a $3,000 bug bounty from Google’s Vulnerability Reward Program.

The update is rolling out across Windows, Mac, and Linux systems over the coming days and weeks.
Jason Ford · Thehackingpost

The Background Fetch API allows web applications to download large files in the background, even when the user has closed the browser tab or navigated away from the website.

This vulnerability could enable malicious actors to manipulate background fetch operations. Specific details of the exploitation remain restricted until the majority of users receive the patch.

The Chrome 144.0.7559 update began rolling out immediately. It will be distributed gradually over several weeks to ensure system stability and allow for proper monitoring.

Users can manually trigger the update by accessing Chrome settings and checking for updates. Windows and Mac users should look for version 144.0.7559.109 or .110, while Linux users will see 144.0.7559.109.

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Security experts recommend that enterprise and individual users prioritize this update, particularly those who rely on web applications utilizing the Background Fetch API. Organizations managing large Chrome deployments should monitor the rollout and validate application compatibility during the update window.

A comprehensive list of all changes included in this build is available in the official Chrome commit log. Users experiencing issues should report them through the bug reporting system or utilize the Chrome community help forum for support.

Google continues to collaborate with security researchers worldwide to enhance Chrome’s security posture and prevent vulnerabilities from affecting users.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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