Vulnerability in Mozilla Firefox
CVE-2026-6770
Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
EPSS: 0.001 (20.4th percentile) — read the EPSS interpretation.
Affected products
- Mozilla Firefox — versions 140.10, 150
- Mozilla Thunderbird — versions 140.10, 150
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2026-6770?
- CVE-2026-6770 is a vulnerability in Mozilla Firefox. Published 2026-04-21.
- Is CVE-2026-6770 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.