CVE-2026-16389

CRITICAL

Incorrect boundary conditions, integer overflow in the Libraries component in NSS

Title source: cna
STIX 2.1

Description

Incorrect boundary conditions, integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

References (3)

Core 3

Scores

CVSS v3 9.8
EPSS 0.0042
EPSS Percentile 34.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-190
Status published
Products (4)
mozilla/firefox < 153.0.0
Mozilla/Firefox 153
mozilla/thunderbird < 153.0
Mozilla/Thunderbird 153
Published Jul 21, 2026
Tracked Since Jul 21, 2026