CVE-2026-12300Patch(mozilla / firefox)
LOWCVSS 5.3 · MEDIUMSignal is active with 1 mentions in latest observed window
Immediate actions
- Patch mozilla firefox systems immediately
Recommended action window: Monitor and triage in normal cycle
NVD description
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
0.5/ 10 priority
Sources & remediation
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-119
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
Are you affected?
If you run products in this scope, you should treat this CVE as relevant to your environment.
- firefox
- thunderbird
Threat summary
- Patch or workaround signal is available
- 1 mentions across 1 observed day
What's happening
- Patch or workaround mentioned in 1 signal
- Technical details provided in 1 signal
- 1 total mentions across 1 day
Affected systems
Vendors
Products
firefoxthunderbird
Deep dive
Activity timeline1 mentions / 1d
Signal classification1 categories
Patch1100.0%
Referenced assets1 URL
CPE platform detail2 entries
2 of 2 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mozilla | firefox | - | - | - |
| App | mozilla | thunderbird | - | - | - |