Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-09-07 | 1 | General1 |
| 2026-09-10 | 1 | Patch1 |
【重要】FirefoxにCVSS 9.6のサンドボックス回避、155へ更新を https://www.cybernote.click/2026/09/02/firefox-cve-2026-84119-84121-sandbox-escape-update/ #IT #Security #cybersecurity
Post summary
The tweet notifies users that Mozilla Firefox’s security update 155 fixes CVSS 9.6 sandbox‑escape vulnerabilities (CVE‑2026‑84119/2026‑84121) and urges immediate patching, with no evidence of current exploitation.
CVE-2026-84119 CVE-2026-84121
Post summary
Only CVE identifiers are listed with no additional context or details.
2 of 2 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mozilla | firefox | - | - | - |
| App | mozilla | thunderbird | - | - | - |