CVE-2026-109741
published 2026-10-13CVE-2026-109741: 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…
PriorityP428medium5.4CVSS 3.1
AVNACLPRNUIRSUCLILAN
EPSS
0.23%
12.9th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 158 | Firefox 158 |
| mozilla | firefox_esr | < Firefox ESR 153.5 | Firefox ESR 153.5 |
| mozilla | thunderbird | < Thunderbird 158 | Thunderbird 158 |
| mozilla | thunderbird | < Thunderbird 153.5 | Thunderbird 153.5 |
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Mozilla
Mozilla Foundation Security Advisory 2026-109: CVE-2026-109741
vendor_mozilla·CVSS 5.4
CVE-2026-109741 [MEDIUM] Mozilla Foundation Security Advisory 2026-109: CVE-2026-109741
Mozilla Foundation Security Advisory 2026-109
CVE: CVE-2026-109741
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 158
Mozilla
Mozilla Foundation Security Advisory 2026-108: CVE-2026-109741
vendor_mozilla·CVSS 5.4
CVE-2026-109741 [MEDIUM] Mozilla Foundation Security Advisory 2026-108: CVE-2026-109741
Mozilla Foundation Security Advisory 2026-108
CVE: CVE-2026-109741
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.5
Mozilla
Mozilla Foundation Security Advisory 2026-110: CVE-2026-109741
vendor_mozilla·CVSS 5.4
CVE-2026-109741 [MEDIUM] Mozilla Foundation Security Advisory 2026-110: CVE-2026-109741
Mozilla Foundation Security Advisory 2026-110
CVE: CVE-2026-109741
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.5
Mozilla
Mozilla Foundation Security Advisory 2026-106: CVE-2026-109741
vendor_mozilla·CVSS 5.4
CVE-2026-109741 [MEDIUM] Mozilla Foundation Security Advisory 2026-106: CVE-2026-109741
Mozilla Foundation Security Advisory 2026-106
CVE: CVE-2026-109741
Product: Firefox
Impact: low
Fixed in: Firefox 158
GHSA
Use-after-free in the Storage: Bucket File System component.
ghsa_unreviewed·2026-10-13
CVE-2026-109741 [MEDIUM] CWE-416 Use-after-free in the Storage: Bucket File System component.
Use-after-free in the Storage: Bucket File System component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-10-13
Published