🛡️ CVE-2022-26386 on Ubuntu — thunderbird

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2022-26386 as tracked by Ubuntu, for the package thunderbird. The fix is available in version 1:91.7.0+build2-0ubuntu1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

UBUNTU-CVE-2022-26386 is classified as CWE-377: Insecure Temporary File. Creating and using insecure temporary files can leave application and system data vulnerable to attack.

Affected software

UBUNTU-CVE-2022-26386 is recorded against 1 package.

  • thunderbird (fixed in 1:91.7.0+build2-0ubuntu1)

Timeline and source

Published on 9 March 2022 and last revised on 22 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.mozilla.org (Report)
ubuntu.com (Advisory)
www.cve.org (Report)

CVE-2022-26386 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2022-03-09
Updated 2026-08-12
Modified 2026-04-22
Fix URL N/A

Affected Packages

Software From version Fixed in
thunderbird — 1:91.7.0+build2-0ubuntu1

Similar Threats

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