CVE-2026-0889 Denial-of-service in the DOM: Service Workers component

Description

Denial-of-service in the DOM: Service Workers component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 147	earliest → < 147	147
Thunderbird 147	earliest → < 147	147

Other CVEs of Firefox

The 2221 CVEs of Firefox →

CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High CVE-2026-118024 Use-after-free in the Graphics: Text component 8.8 High