p PatchFirst

PatchFirst · Latest vulnerabilities

thunderbird vulnerabilities · Page 23

Vulnerabilities published for thunderbird in the last 30 days: 263. Listed in the KEV catalogue: 0.

Filter vulnerabilities
Clear filters

Vulnerabilities: 1304

  1. CVE-2026-84145

    High · CVSS 7.5EPSS 0.37%No fix published

    Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

    Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Published Updated
  2. CVE-2026-84131

    High · CVSS 8.8EPSS 0.33%No fix published

    Privilege escalation due to invalid pointer in the Graphics component

    Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Published Updated
  3. CVE-2026-84121

    Critical · CVSS 9.6EPSS 0.32%No fix published

    Sandbox escape due to use-after-free in the DOM: Security component

    Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Published Updated
  4. CVE-2026-84119

    Critical · CVSS 9.6EPSS 0.32%No fix published

    Sandbox escape due to use-after-free in the DOM: Navigation component

    Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

    Published Updated
  5. CVE-2026-74989

    Critical · CVSS 9.8EPSS 0.57%No fix published

    Internally found bugs fixed in Firefox 154

    Internally found bugs present in Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.

    Published Updated
  6. CVE-2026-74988

    Critical · CVSS 9.8EPSS 0.61%No fix published

    Internally found bugs fixed in Firefox ESR 153.1 and Firefox 154

    Internally found bugs present in Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

    Published Updated

Check your server

Check your installed stack and versions against the current vulnerability feeds.

Check your server →