CVE-2025-26695 – Thunderbird OpenPGP WKD Padding Size Disclosure

The following table lists the changes that have been made to the
CVE-2025-26695 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Mar. 10, 2025

    Action Type Old Value New Value
    Added Description When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network observer could have learned the length of the requested email address. This vulnerability affects Thunderbird < 136 and Thunderbird < 128.8.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1883039
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-17/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-18/
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