CVE-2026-117878
Medium
Description
Other issue, use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
SeverityMedium
CVSS6.3
Exploit probability—
Product
Firefox
PublishedOct 27, 2026
First seenOct 27, 2026
How to fix
Update
- Mozilla Firefox159 or later
- Mozilla Firefox ESR115.44, 153.6 or later
- Mozilla Thunderbird159, 153.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Mozilla Firefox | No range specified | 159 |
| Mozilla Firefox ESR | No range specified | 115.44, 153.6 |
| Mozilla Thunderbird | No range specified | 159, 153.6 |
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