CVE-2026-8091

high

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.

References

https://www.mozilla.org/security/advisories/mfsa2026-42/

https://www.mozilla.org/security/advisories/mfsa2026-39/

https://www.mozilla.org/security/advisories/mfsa2026-36/

https://www.mozilla.org/security/advisories/mfsa2026-33/

https://www.mozilla.org/security/advisories/mfsa2026-30/

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8091.json

https://bugzilla.redhat.com/show_bug.cgi?id=2467699

https://bugzilla.mozilla.org/show_bug.cgi?id=2029301

https://access.redhat.com/security/cve/CVE-2026-8091

https://access.redhat.com/errata/RHSA-2026:27715

https://access.redhat.com/errata/RHSA-2026:26630

https://access.redhat.com/errata/RHSA-2026:26629

https://access.redhat.com/errata/RHSA-2026:26606

https://access.redhat.com/errata/RHSA-2026:26551

https://access.redhat.com/errata/RHSA-2026:26539

https://access.redhat.com/errata/RHSA-2026:26536

https://access.redhat.com/errata/RHSA-2026:26521

https://access.redhat.com/errata/RHSA-2026:26493

https://access.redhat.com/errata/RHSA-2026:26492

https://access.redhat.com/errata/RHSA-2026:26491

https://access.redhat.com/errata/RHSA-2026:26270

https://access.redhat.com/errata/RHSA-2026:26269

https://access.redhat.com/errata/RHSA-2026:26268

https://access.redhat.com/errata/RHSA-2026:26174

Details

Source: Mitre, NVD

Published: 2026-05-07

Updated: 2026-07-22

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00009

Detections

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