CVE Feed

    Dashboard / CVE / CVE-2025-26696

    CVE-2025-26696

    Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead contained an OpenPGP signed message, were wrongly shown as being encrypted. This vulnerability was fixed in Thunderbird 136 and Thunderbird 128.8.

    Published:Mar 10, 2025
    Last Modified:Apr 21, 2026
    EPS:Mar 10, 2025
    EPSS Score:0.00159
    CVSS Score:7

    Affected Products

    Vendor
    Mozilla
    Product
    Thunderbird

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-84642 (CVSS 7.5) — The values of the mail.allowed_attachment_hostnames advanced config setting were used in a regular expression …
    CVE-2026-84641 (CVSS 7.5) — A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response…
    CVE-2026-84640 (CVSS 7.5) — A maliciously constructed mail header could lead to a one byte read past the end of a buffer. This vulnerabili…
    CVE-2026-84639 (CVSS 9.1) — Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnera…
    CVE-2026-84637 (CVSS 9.8) — Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on…
    CVE-2026-84144 (CVSS 7.5) — Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence…
    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High