### [CVE-2024-5690](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-5690)
![](https://img.shields.io/static/v1?label=Product&message=Firefox%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=unspecified%3C%20115.12%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=unspecified%3C%20127%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=External%20protocol%20handlers%20leaked%20by%20timing%20attack&color=brighgreen)

### Description

By monitoring the time certain operations take, an attacker could have guessed which external protocol handlers were functional on a user's system. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1883693

#### Github
No PoCs found on GitHub currently.