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thunderbird vulnerabilities · Page 21

Vulnerabilities published for thunderbird in the last 30 days: 278. Listed in the KEV catalogue: 0.

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Vulnerabilities: 1344

  1. CVE-2026-15719

    Medium · CVSS 5.4EPSS 0.29%Fix available

    Site isolation issue in the DOM: Navigation component

    We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.

    • Update to 1:140.13.0esr-1
    Published Updated
  2. CVE-2026-57962

    Medium · CVSS 5.3EPSS 0.34%Fix available

    Denial-of-service via malicious LDAP address-book server

    A malicious LDAP server, which a Thunderbird user is configured to query for address-book autocomplete, can stash arbitrarily large amounts of attacker-supplied data into the Thunderbird LDAP client until it crashes due to memory exhaustion. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.

    • Update to 1:140.13.0esr-1
    Published Updated

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