Chrome and Firefox Updates Deliver 219 Security Fixes
Summary
Google and Mozilla released Chrome and Firefox updates on October 27, addressing 52 security issues in Chrome and 167 vulnerabilities in Firefox. The fixes include use-after-free flaws; both updates are rolling out gradually.
Key points
- Chrome 156.0.8078.73/.74 for Windows and Mac, and 156.0.8078.73 for Linux, includes 52 security fixes, four rated Critical.
- Mozilla Security Advisory 2026-118 covers 167 vulnerabilities; Firefox 159 also adds features.
- Both updates will roll out over the coming days and weeks. Users can check for updates through each browser’s About menu and relaunch to apply them.
- The updates address use-after-free flaws involving page layout, JavaScript processing, and SVG graphics. Such flaws can cause crashes and may sometimes allow code execution.
- Google and Mozilla credited OpenAI Codex Security with finding bugs fixed in the releases. The article also describes Mozilla researchers validating AI-discovered findings before reporting them.
Article Details
- Event Type
- Google and Mozilla released browser security updates for Chrome and Firefox.
- Impact
- The updates fix security vulnerabilities, including use-after-free flaws involving page layout, JavaScript processing, and SVG graphics. Google’s Chrome update includes 52 security fixes, four rated Critical; Mozilla’s Firefox 159 fixes 167 vulnerabilities. Such flaws can cause crashes and, in some cases, allow code execution. The updates are rolling out over the coming days and weeks.