CVE-2024-1936 Information disclosure in Thunderbird

What is CVE-2024-1936?

CVE-2024-1936 is a high-severity vulnerability in Debian Debian Linux, published on 4 Mar 2024. 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

The encrypted subject of an email message could be incorrectly and permanently assigned to an arbitrary other email message in Thunderbird's local cache. Consequently, when replying to the contaminated email message, the user might accidentally leak the confidential subject to a third-party. While this update fixes the bug and avoids future message contamination, it does not automatically repair existing contaminations. Users are advised to use the repair folder functionality, which is available from the context menu of email folders, which will erase incorrect subject assignments. This vulnerability affects Thunderbird < 115.8.1.

Weakness: CWE-922

Which versions are affected by CVE-2024-1936?

It affects 2 products.

Products include Debian Debian Linux, Mozilla Thunderbird.

How do I fix CVE-2024-1936?

Upgrade to a fixed version.

Is CVE-2024-1936 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1936 exists.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2024-1936, GHSA-8v87-67f4-56h2, MGASA-2024-0054, SUSE-SU-2024:0893-1, UBUNTU-CVE-2024-1936, openSUSE-SU-2024:13753-1.