Mmastodon TechnologyCybersecurity first seen 2 d ago, last 2 d ago, peak #6

Firefox fixes site isolation flaw in Service Workers

Original: 🚨 EUVD-2026-110990 📊 Score: n/a 📅 Updated: 2026-10-27 📝 Site isolation issue in the DOM: Service Workers component. This

A vulnerability tracked as EUVD-2026-110990, a site isolation issue in the DOM Service Workers component, was updated in the EU vulnerability database on 27 October 2026. Mozilla has fixed the flaw in Firefox 159 and Firefox ESR 153.6, and users are advised to update their browsers.

Why now: A newly published vulnerability affecting a widely used browser prompts security teams to patch.

MozillaFirefoxENISAFirefox ESR

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Evidence

• 🚨 EUVD-2026-110990 📊 Score: n/a 📅 Updated: 2026-10-27 📝 Site isolation issue in the DOM: Service Workers component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6. 🔗 https:// euvd.enisa.europa.eu/vulnerabi lity/EUVD-2026-110990 # cybersecurity # infosec #… · EUVD_Bot

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