CVE-2026-8968
published 2026-05-19CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird…
PriorityP338high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.41%
33.5th percentile
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Affected
10 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 |
| mozilla | thunderbird | < 151.0.0 | 151.0.0 |
| rhel10 | firefox-flatpak | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
vendor_redhat·2026-05-19·CVSS 7.5
CVE-2026-8968 [HIGH] firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs 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-2026-8968
vendor_mozilla·CVSS 7.5
CVE-2026-8968 [HIGH] Mozilla Foundation Security Advisory 2026-50: CVE-2026-8968
Mozilla Foundation Security Advisory 2026-50
CVE: CVE-2026-8968
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 151
Mozilla
Mozilla Foundation Security Advisory 2026-48: CVE-2026-8968
vendor_mozilla·CVSS 7.5
CVE-2026-8968 [HIGH] Mozilla Foundation Security Advisory 2026-48: CVE-2026-8968
Mozilla Foundation Security Advisory 2026-48
CVE: CVE-2026-8968
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.11
Mozilla
Mozilla Foundation Security Advisory 2026-46: CVE-2026-8968
vendor_mozilla·CVSS 7.5
CVE-2026-8968 [HIGH] Mozilla Foundation Security Advisory 2026-46: CVE-2026-8968
Mozilla Foundation Security Advisory 2026-46
CVE: CVE-2026-8968
Product: Firefox
Impact: high
Fixed in: Firefox 151
Mozilla
Mozilla Foundation Security Advisory 2026-51: CVE-2026-8968
vendor_mozilla·CVSS 7.5
CVE-2026-8968 [HIGH] Mozilla Foundation Security Advisory 2026-51: CVE-2026-8968
Mozilla Foundation Security Advisory 2026-51
CVE: CVE-2026-8968
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.11
GHSA
GHSA-g34x-mgc7-jqch: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
ghsa_unreviewed·2026-05-19
CVE-2026-8968 [HIGH] CWE-400 GHSA-g34x-mgc7-jqch: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.
VulDB
Mozilla Firefox up to 140.10/150 Web Codecs denial of service (EUVD-2026-30916)
vuldb·2026-05-19·CVSS 7.5
CVE-2026-8968 [HIGH] Mozilla Firefox up to 140.10/150 Web Codecs denial of service (EUVD-2026-30916)
A vulnerability has been found in Mozilla Firefox up to 140.10/150 and classified as problematic. This vulnerability affects unknown code of the component Web Codecs. This manipulation causes denial of service.
This vulnerability is registered as CVE-2026-8968. Remote exploitation of the attack is possible. No exploit is available.
The affected component should be upgraded.
No detection rules found.
No public exploits indexed.
2026-05-19
Published