Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-8959 Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, an… https://www.cve.org/CVERecord?id=CVE-2026-8959
Post summary
CVE-2026-8959 is a sandbox escape flaw in Firefox and Thunderbird, fixed in specific major releases.
CVE-2026-8959 Sandbox Escape via Incorrect Boundary Conditions in Firefox Win32 Widget Component https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-8959
Post summary
The brief notice identifies a sandbox escape vulnerability in Firefox but provides no PoC, exploit, patch, or evidence of active exploitation.
4 of 4 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mozilla | firefox | - | - | - |
| App | mozilla | firefox | - | - | - |
| App | mozilla | thunderbird | - | - | - |
| App | mozilla | thunderbird | - | - | - |