CVE-2026-2762

CRITICAL

Firefox < 148.0 and < 140.8.0 - Integer Overflow in JavaScript Standard Library

Title source: llm
STIX 2.1

Description

Integer overflow in the JavaScript: Standard Library component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

References (33)

Core 33
Core References

Scores

CVSS v3 9.8
EPSS 0.0054
EPSS Percentile 42.5%
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 (8)
mozilla/firefox < 140.8.0
mozilla/firefox < 148.0
Mozilla/Firefox 140.8 - 140.*
Mozilla/Firefox 148
mozilla/thunderbird < 140.8.0
mozilla/thunderbird < 148.0
Mozilla/Thunderbird 140.8 - 140.*
Mozilla/Thunderbird 148
Published Feb 24, 2026
Tracked Since Feb 24, 2026