VDB
CVE-2026-109741
CVE-2026-109741
PUBLISHED
CVSS 5.4 MEDIUM
Reported by mozilla · Published October 13, 2026
Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Risk Scores
CVSS 3.1
5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 153.5, 158 |
| Mozilla | Thunderbird | 153.5, 158 |
| Mozilla | Thunderbird | 153.5, 158 |
| Mozilla | Firefox | 153.5, 158 |
| chainguard | firefox-esr-140 | 0 |
Timeline
- Oct 13, 2026 Coalition ESS Score
- Oct 13, 2026 CVE Published
- Oct 13, 2026 CVE Updated
- Oct 14, 2026 EPSS Score
- Oct 19, 2026 EPSS Score
- Oct 22, 2026 EPSS Score
- Oct 25, 2026 EPSS Score