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CVE-2026-8946 Incorrect boundary conditions in the Audio/Video: Web Codecs component

🗓️ 19 May 2026 12:29:36Reported by mozillaType 
vulnrichment
 vulnrichment🔗 github.com👁 15 Views

CVE-2026-8946 fixes boundary issues in the Audio/Video Web Codecs component; fixed in Firefox 151 and ESR 115.36, 140.11.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB		CVE-2026-8946
19 May 202612:29
–attackerkb
nessus
Tenable Nessus		Amazon Linux 2023 : firefox (ALAS2023-2026-1793)
8 Jun 202600:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3340 (ALAS-2026-3340)
8 Jun 202600:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : firefox, --advisory ALAS2FIREFOX-2026-061 (ALASFIREFOX-2026-061)
8 Jun 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 9 : firefox (ALSA-2026:21378)
3 Jun 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 10 : firefox (ALSA-2026:21380)
29 May 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 9 : thunderbird (ALSA-2026:21381)
29 May 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : firefox (ALSA-2026:21382)
29 May 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 10 : thunderbird (ALSA-2026:22325)
3 Jun 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : thunderbird (ALSA-2026:22643)
3 Jun 202600:00
–nessus
Rows per page
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19 May 2026 17:10Current
5.8Medium risk
Vulners AI Score5.8
EPSS0.0056
SSVC
audio videoweb codecsboundary issuesfirefox updateextended support release
15