8.8
High
CVE-2026-100801 Privilege escalation in the DLL Services component
Description
Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 159 | earliest → < 159 | 159 |
| Firefox 157 | earliest → < 157 | 157 |
| Firefox 153.6 | earliest → < 153.6 | 153.6 |
| Firefox 153.4 | earliest → < 153.4 | 153.4 |
| Firefox 140.17 | earliest → < 140.17 | 140.17 |
| Thunderbird 159 | earliest → < 159 | 159 |
| Thunderbird 157 | earliest → < 157 | 157 |
| Thunderbird 153.6 | earliest → < 153.6 | 153.6 |
| Thunderbird 153.4 | earliest → < 153.4 | 153.4 |
Show the other branch Hide the other branch
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 140.17 | earliest → < 140.17 | 140.17 |
Other CVEs of Firefox
The 2221 CVEs of Firefox →
CVE-2026-120572
Incorrect boundary conditions in the Layout: Block and Inline component
8.8
High
CVE-2026-118027
Frame poisoning in the Layout component
9.1
Critical
CVE-2026-118024
Use-after-free in the Graphics: Text component
8.8
High
CVE-2026-118026
Invalid pointer in the JavaScript: GC component
8.8
High