VDB
CVE-2026-7323
CVE-2026-7323
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Memory safety bugs present in Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1 and Firefox ESR 140.10.1.
EPSS 0.02% · 6.0th percentile
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.02%
6.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 140.10.1, 150.0.1 |
Timeline
- CVE Published
- Apr 28, 2026 PoC Published
- Apr 29, 2026 EPSS Score
- Apr 30, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 19, 2026 Distribution Patch
- May 19, 2026 Security Advisory
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score