CVE-2025-8036 – Thunderbird CORS Preloading DNS Rebinding

The following table lists the changes that have been made to the
CVE-2025-8036 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]

    Jul. 22, 2025

    Action Type Old Value New Value
    Added Description Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1960834
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-56/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-59/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-61/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-63/
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