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CVE-2026-74986

Firefox

Description

Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS 9.1EPSS 0.32299999999999995%Risk 0.94
View source
Published
2026-08-18 13:17:40
Affected versions
<154
Type
Web application
Last modified
2026-08-25 16:11:58
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H