CVE-2026-8091
published 2026-05-07CVE-2026-8091: Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1…
PriorityP351critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.44%
35.7th percentile
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.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < 115.35.2 | 115.35.2 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.10.1 | 140.10.1 |
| mozilla | firefox_esr | < Firefox ESR 115.35.2 | Firefox ESR 115.35.2 |
| mozilla | thunderbird | — | — |
| mozilla | thunderbird | >= 140.0 < 140.10.1 | 140.10.1 |
| rhel10 | firefox-flatpak | — | — |
| rhel10 | thunderbird-flatpak | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
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Red Hat
firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component
vendor_redhat·2026-05-07·CVSS 9.8
CVE-2026-8091 [CRITICAL] CWE-805 firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component
firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component
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.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Incorrect boundary conditions in the Audio/Video: Playback component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise
Mozilla
Mozilla Foundation Security Advisory 2026-42: CVE-2026-8091
vendor_mozilla
CVE-2026-8091 Mozilla Foundation Security Advisory 2026-42: CVE-2026-8091
Mozilla Foundation Security Advisory 2026-42
CVE: CVE-2026-8091
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.35.2
GHSA
GHSA-jx5x-3wf9-9rhg: Incorrect boundary conditions in the Audio/Video: Playback component
ghsa_unreviewed·2026-05-07
CVE-2026-8091 [CRITICAL] CWE-754 GHSA-jx5x-3wf9-9rhg: Incorrect boundary conditions in the Audio/Video: Playback component
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.
VulDB
Mozilla Firefox up to 115.35.1/140.10.1 Playback memory corruption
vuldb·2026-05-07
CVE-2026-8091 [CRITICAL] Mozilla Firefox up to 115.35.1/140.10.1 Playback memory corruption
A vulnerability described as critical has been identified in Mozilla Firefox up to 115.35.1/140.10.1. Affected by this vulnerability is an unknown functionality of the component Playback Component. Such manipulation leads to memory corruption.
This vulnerability is documented as CVE-2026-8091. The attack can be executed remotely. There is not any exploit available.
Upgrading the affected component is recommended.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2029301https://www.mozilla.org/security/advisories/mfsa2026-30/https://www.mozilla.org/security/advisories/mfsa2026-33/https://www.mozilla.org/security/advisories/mfsa2026-36/https://www.mozilla.org/security/advisories/mfsa2026-39/https://www.mozilla.org/security/advisories/mfsa2026-42/https://access.redhat.com/security/cve/CVE-2026-8091https://bugzilla.redhat.com/show_bug.cgi?id=2467699https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8091.json
2026-05-07
Published