Not rated
CVE-2019-9791 The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects…
Description
The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 60.6 | earliest → < 60.6 | 60.6 |
| Firefox ESR 60.6 | earliest → < 60.6 | 60.6 |
| Firefox 66 | earliest → < 66 | 66 |
Other CVEs of Thunderbird
The 1713 CVEs of Thunderbird →
CVE-2026-118180
Matrix homeserver could redirect the chat session to a local file or network share
7.5
High
CVE-2026-118179
Request forgery via news: links
8.8
High
CVE-2026-118177
Calendar discovery accepted local file and remote network share locations
9.1
Critical
CVE-2026-118178
RSS feed could redirect its subscription to a local file or network share
5.7
Medium