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8.8 High

CVE-2026-2781 Integer overflow in the Libraries component in NSS

Description

Integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, Thunderbird 140.8, and Firefox ESR 115.35.

Affected products and versions

Product Affected versions Fixed in
Firefox 148 earliest → < 148 148
Firefox 140.8 earliest → < 140.8 140.8
Firefox 115.35 earliest → < 115.35 115.35
Thunderbird 148 earliest → < 148 148
Thunderbird 140.8 earliest → < 140.8 140.8

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