CVE-2026-4723
CRITICAL
9.8
CVSS 3.1
Description
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Metadata
Severity & Metrics
9.8
CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Mozilla | Firefox | — | 149 ≤ * |
| Mozilla | Thunderbird | — | 149 ≤ * |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-416 | adp | CWE-416 Use After Free |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 9.8 | CRITICAL | 3.1 | adp | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (3)