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 (30)

Core 30
Core References

Scores

CVSS v3 7.5
EPSS 0.0056
EPSS Percentile 42.7%
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 CWE-787
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