7.5
High
CVE-2023-4583 When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available…
Description
When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 117 | earliest → < 117 | 117 |
| Firefox ESR 115.2 | earliest → < 115.2 | 115.2 |
| Thunderbird 115.2 | earliest → < 115.2 | 115.2 |
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