CVE-2026-8946

HIGH

Incorrect boundary conditions in the Audio/Video: Web Codecs component

Title source: cna
STIX 2.1

Description

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

References (6)

Core 6

Scores

CVSS v3 7.5
EPSS 0.0004
EPSS Percentile 11.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-119
Status published
Products (8)
mozilla/firefox < 115.36.0
mozilla/firefox < 151.0.0
Mozilla/Firefox 115.36 - 115.*
Mozilla/Firefox 140.11 - 140.*
Mozilla/Firefox 151
mozilla/thunderbird < 140.11
Mozilla/Thunderbird 140.11 - 140.*
Mozilla/Thunderbird 151
Published May 19, 2026
Tracked Since May 19, 2026