CVE-2026-8091

Incorrect boundary conditions in the Audio/Video: Playback component

Published May 7, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
Link Providers
https://access.redhat.com/errata/RHSA-2026:19153 cve-icon
https://access.redhat.com/errata/RHSA-2026:19157 cve-icon
https://access.redhat.com/errata/RHSA-2026:19348 cve-icon
https://access.redhat.com/errata/RHSA-2026:19370 cve-icon
https://access.redhat.com/errata/RHSA-2026:19588 cve-icon
https://access.redhat.com/errata/RHSA-2026:20586 cve-icon
https://access.redhat.com/errata/RHSA-2026:21743 cve-icon
https://access.redhat.com/errata/RHSA-2026:22324 cve-icon
https://access.redhat.com/errata/RHSA-2026:22408 cve-icon
https://access.redhat.com/errata/RHSA-2026:22409 cve-icon
https://access.redhat.com/errata/RHSA-2026:22410 cve-icon
https://access.redhat.com/errata/RHSA-2026:22708 cve-icon
https://access.redhat.com/errata/RHSA-2026:22712 cve-icon
https://access.redhat.com/errata/RHSA-2026:22847 cve-icon
https://access.redhat.com/errata/RHSA-2026:24345 cve-icon
https://access.redhat.com/errata/RHSA-2026:24717 cve-icon
https://access.redhat.com/errata/RHSA-2026:24718 cve-icon
https://access.redhat.com/errata/RHSA-2026:24719 cve-icon
https://access.redhat.com/errata/RHSA-2026:24721 cve-icon
https://access.redhat.com/errata/RHSA-2026:24844 cve-icon
https://access.redhat.com/errata/RHSA-2026:24846 cve-icon
https://access.redhat.com/errata/RHSA-2026:25014 cve-icon
https://access.redhat.com/security/cve/CVE-2026-8091 cve-icon
https://bugzilla.mozilla.org/show_bug.cgi?id=2029301 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2467699 cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8091.json cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-30/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-33/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-36/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-39/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-42/ cve-icon cve-icon
History
Type Values Removed Values Added
References
Type Values Removed Values Added
First Time appeared Mozilla thunderbird
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Vendors & Products Mozilla thunderbird
Type Values Removed Values Added
Weaknesses CWE-126
CWE-787
Type Values Removed Values Added
Weaknesses CWE-754
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-126
CWE-787
Type Values Removed Values Added
Weaknesses CWE-119
CWE-127
Type Values Removed Values Added
Description Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Firefox ESR 115.35.2. Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.
Weaknesses CWE-119
CWE-127
References
Type Values Removed Values Added
Description Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox ESR 140.10.2 and Firefox ESR 115.35.2. Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Firefox ESR 115.35.2.
References
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Description Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox ESR 140.10.2 and Firefox ESR 115.35.2.
Title Incorrect boundary conditions in the Audio/Video: Playback component
References

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Aug 11, 2026, 12:04 PM
Reserved
May 7, 2026, 12:45 PM
Status
Modified
Published
May 7, 2026, 1:16 PM
Modified
Oct 26, 2026, 12:10 AM