CVE-2026-6778
published 2026-04-21CVE-2026-6778: Invalid pointer in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
PriorityP425medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
0.26%
17.3th percentile
Invalid pointer in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 150 | Firefox 150 |
| mozilla | firefox | < 150.0 | 150.0 |
| mozilla | thunderbird | < Thunderbird 150 | Thunderbird 150 |
| mozilla | thunderbird | < 150.0 | 150.0 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
vendor_redhat5.3MEDIUM
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VulDB
Mozilla Firefox up to 149 Playback Remote Code Execution (Nessus ID 310611 / WID-SEC-2026-1228)
vuldb·2026-05-21·CVSS 5.3
CVE-2026-6778 [MEDIUM] Mozilla Firefox up to 149 Playback Remote Code Execution (Nessus ID 310611 / WID-SEC-2026-1228)
A vulnerability was found in Mozilla Firefox up to 149 and classified as critical. The affected element is an unknown function of the component Playback. Executing a manipulation can lead to Remote Code Execution.
The identification of this vulnerability is CVE-2026-6778. The attack may be launched remotely. There is no exploit available.
It is suggested to upgrade the affected component.
GHSA
GHSA-xm94-m277-f852: Invalid pointer in the Audio/Video: Playback component
ghsa_unreviewed·2026-04-21
CVE-2026-6778 [MEDIUM] CWE-476 GHSA-xm94-m277-f852: Invalid pointer in the Audio/Video: Playback component
Invalid pointer in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150.
Red Hat
CVE-2026-6778: A flaw was found in Firefox
vendor_redhat·2026-04-21·CVSS 5.3
CVE-2026-6778 [MEDIUM] CWE-825 CVE-2026-6778: A flaw was found in Firefox
A flaw was found in Firefox. An invalid pointer within the Audio/Video: Playback component could allow a remote attacker to potentially execute arbitrary code or cause a denial of service. This vulnerability arises from improper memory handling, which can lead to system instability or unauthorized operations.
Mozilla
Mozilla Foundation Security Advisory 2026-30: CVE-2026-6778
vendor_mozilla·CVSS 5.3
CVE-2026-6778 [MEDIUM] Mozilla Foundation Security Advisory 2026-30: CVE-2026-6778
Mozilla Foundation Security Advisory 2026-30
CVE: CVE-2026-6778
Product: Firefox
Impact: high
Fixed in: Firefox 150
Mozilla
Mozilla Foundation Security Advisory 2026-33: CVE-2026-6778
vendor_mozilla·CVSS 5.3
CVE-2026-6778 [MEDIUM] Mozilla Foundation Security Advisory 2026-33: CVE-2026-6778
Mozilla Foundation Security Advisory 2026-33
CVE: CVE-2026-6778
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 150
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-04-21
Published