CVE-2026-0881Critical· 10.0▾ MidnightSandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 55 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.4%
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
firefox < 147.0thunderbird < 147.0Upgrade past the affected range:
firefox 147.0thunderbird 147.0Connected by shared product, vendor, weakness, or advisory.
CVE-2025-1941Critical· 9.1Under certain circumstances, a user opt-in setting that Focus should require authentication before use could have been be bypassed (distinct from CVE-2025-0245)
CVE-2026-118008High· 8.8Privilege escalation in the DOM: Navigation component
CVE-2026-117999NoneRace condition in the IPC component
CVE-2026-117976NoneSite isolation issue in the DOM: Navigation component
CVE-2026-118027NoneFrame poisoning in the Layout component
CVE-2026-118024NoneUse-after-free in the Graphics: Text component