CVE-2026-8954
published 2026-05-19CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151…
PriorityP341high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.43%
34.5th percentile
Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 151 | Firefox 151 |
| mozilla | firefox | < 140.11.0 | 140.11.0 |
| mozilla | firefox | < 151.0.0 | 151.0.0 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 140.11 | Firefox ESR 140.11 |
| mozilla | thunderbird | < Thunderbird 151 | Thunderbird 151 |
| mozilla | thunderbird | < Thunderbird 140.11 | Thunderbird 140.11 |
| mozilla | thunderbird | < 140.11 | 140.11 |
| rhel10 | firefox-flatpak | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vendor_redhat7.5HIGH
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Red Hat
firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component
vendor_redhat·2026-05-19·CVSS 7.5
CVE-2026-8954 [HIGH] CWE-190 firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component
firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Incorrect boundary conditions, integer overflow in the Audio/Video 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: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 7) - Affected
Package: firefox (Red Hat Enterprise Linux 8) - Affected
Package: firefox (Red Hat Enterprise Linux 9) - Affected
Mozilla
Mozilla Foundation Security Advisory 2026-50: CVE-2026-8954
vendor_mozilla·CVSS 7.5
CVE-2026-8954 [HIGH] Mozilla Foundation Security Advisory 2026-50: CVE-2026-8954
Mozilla Foundation Security Advisory 2026-50
CVE: CVE-2026-8954
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 151
Mozilla
Mozilla Foundation Security Advisory 2026-46: CVE-2026-8954
vendor_mozilla·CVSS 7.5
CVE-2026-8954 [HIGH] Mozilla Foundation Security Advisory 2026-46: CVE-2026-8954
Mozilla Foundation Security Advisory 2026-46
CVE: CVE-2026-8954
Product: Firefox
Impact: high
Fixed in: Firefox 151
Mozilla
Mozilla Foundation Security Advisory 2026-48: CVE-2026-8954
vendor_mozilla·CVSS 7.5
CVE-2026-8954 [HIGH] Mozilla Foundation Security Advisory 2026-48: CVE-2026-8954
Mozilla Foundation Security Advisory 2026-48
CVE: CVE-2026-8954
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.11
Mozilla
Mozilla Foundation Security Advisory 2026-51: CVE-2026-8954
vendor_mozilla·CVSS 7.5
CVE-2026-8954 [HIGH] Mozilla Foundation Security Advisory 2026-51: CVE-2026-8954
Mozilla Foundation Security Advisory 2026-51
CVE: CVE-2026-8954
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.11
VulDB
Mozilla Firefox up to 140.10/150 Audio/Video integer overflow (EUVD-2026-30906)
vuldb·2026-05-19·CVSS 7.5
CVE-2026-8954 [HIGH] Mozilla Firefox up to 140.10/150 Audio/Video integer overflow (EUVD-2026-30906)
A vulnerability described as critical has been identified in Mozilla Firefox up to 140.10/150. This impacts an unknown function of the component Audio/Video. Such manipulation leads to integer overflow.
This vulnerability is referenced as CVE-2026-8954. It is possible to launch the attack remotely. No exploit is available.
Upgrading the affected component is recommended.
GHSA
GHSA-4g4m-32hr-qwg6: Incorrect boundary conditions, integer overflow in the Audio/Video component
ghsa_unreviewed·2026-05-19
CVE-2026-8954 [HIGH] CWE-119 GHSA-4g4m-32hr-qwg6: Incorrect boundary conditions, integer overflow in the Audio/Video component
Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.
No detection rules found.
No public exploits indexed.
2026-05-19
Published