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8.8 High

CVE-2026-92074 Mitigation bypass in the Popup Blocker component

Description

Mitigation bypass in the Popup Blocker component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Affected products and versions

Product Affected versions Fixed in
Firefox 156 earliest → < 156 156
Firefox 153.3 earliest → < 153.3 153.3
Thunderbird 156 earliest → < 156 156
Thunderbird 153.3 earliest → < 153.3 153.3

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-2026-118025 Other issue in the SVG component 8.8 High
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