CVE-2026-2774

CRITICAL

Firefox and Thunderbird - Integer Overflow in Audio/Video Component

Title source: llm
STIX 2.1

Description

Integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

References (34)

Core 34
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 no
Technical Impact total

Details

CWE
CWE-190
Status published
Products (9)
mozilla/firefox < 115.33.0
mozilla/firefox < 148.0
Mozilla/Firefox 115.33 - 115.*
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