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4.3 Medium

CVE-2026-0887 Clickjacking issue, information disclosure in the PDF Viewer component

Description

Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Affected products and versions

Product Affected versions Fixed in
Firefox 147 earliest → < 147 147
Firefox 140.7 earliest → < 140.7 140.7
Firefox ESR 140.7 earliest → < 140.7 140.7
Thunderbird 147 earliest → < 147 147
Thunderbird 140.7 earliest → < 140.7 140.7

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-2026-118024 Use-after-free in the Graphics: Text component 8.8 High CVE-2026-118025 Other issue in the SVG component 8.8 High
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