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SecurityWeek Malware & Threats Cyberwarfare Cybercrime Data Breaches Fraud & Identity Theft Nation-State Ransomware Vulnerabilities Security Operations Threat Intelligence Incident Response Tracking & Law Enforcement Security Architecture Application Security Cloud Security Endpoint Security Identity & Access IoT Security Mobile & Wireless Network Security Risk Management Cyber Insurance Data Protection Privacy & Compliance Supply Chain Security CISO Strategy Cyber Insurance CISO Conversations CISO Forum ICS/OT Industrial Cybersecurity ICS Cybersecurity Conference Funding/M&A Cybersecurity Funding M&A Tracker Cyber AI Vulnerabilities Chrome and Firefox Updates Patch Dozens of Vulnerabilities The browser refreshes fix multiple use-after-free, sandbox escape, and privilege escalation bugs. By Ionut Arghire | September 2, 2026 (5:12 AM ET) Flipboard Reddit Whatsapp Whatsapp Email Google and Mozilla on Tuesday announced patches for dozens of vulnerabilities across Chrome and Firefox, including critical- and high-severity flaws. A fresh Chrome 152 update has been rolled out with fixes for 26 bugs, two of which are critical-severity use-after-free issues in Shared Tab Groups (CVE-2026-84353) and WebGL (CVE-2026-84352). The update also addresses nine high-severity security defects, including use-after-free, incorrect authorization, information leak, improper input validation, uninitialized resource, and buffer overflow weaknesses. The remaining 15 vulnerabilities are medium- and low-severity issues. Per Google’s advisory, only three of the flaws were reported by external researchers, but no bug bounty reward has been disclosed. The latest Chrome iteration is now rolling out as versions 152.0.7977.75/.76 for Windows and macOS, and as version 152.0.7977.75 for Linux. Mozilla rolled out Firefox 155 with patches for 29 security defects, including 13 high-severity use-after-free, sandbox escape, and memory corruption issues.Advertisement. Scroll to continue reading. The flaws were addressed in Firefox’s GC, Navigation, Audio/Video, Security, WebGPU, Core & HTML, and Grid components, and in Firefox for Android. Three of the issued CVEs cover multiple bugs leading to memory corruption that could have been potentially exploited “with enough effort”. On Tuesday, Mozilla also announced the release of Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2 with fixes for these vulnerabilities. Google and Mozilla make no mention of any of these vulnerabilities being exploited in the wild. 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