CVE-2022-26386 Information disclosure in Firefox ESR
Local attackers can read temporary files downloaded by Firefox or Thunderbird on macOS and Linux due to insecure permissions in the shared /tmp directory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-26386?
CVE-2022-26386 is a medium-severity vulnerability in Mozilla Firefox Esr, published on 22 Dec 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Previously Firefox for macOS and Linux would download temporary files to a user-specific directory in <code>/tmp</code>, but this behavior was changed to download them to <code>/tmp</code> where they could be affected by other local users. This behavior was reverted to the original, user-specific directory. <br>*This bug only affects Firefox for macOS and Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.7 and Thunderbird < 91.7.
Weakness: CWE-377
Which versions are affected by CVE-2022-26386?
It affects 2 products.
Products include Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2022-26386?
Upgrade to a fixed version.
Is CVE-2022-26386 being exploited?
There is no known exploitation of CVE-2022-26386 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox Esr
Sources
Also known as DEBIAN-CVE-2022-26386, GHSA-8xcq-8jhf-w82h, UBUNTU-CVE-2022-26386.