Veille CVE

Mardi 1 septembre 2026

29 CVE

Critique 10 Élevée 8 Moyenne 11 Faible 0 Non évaluée 0 Exploitées (KEV) Tri : plus récentes « mozilla firefox » ✕
  1. CVE-2026-84145 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    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.

  2. CVE-2026-84144 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. 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 153.2, Thunderbird 155, and Thunderbird 153.2.

  3. CVE-2026-84143 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    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 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  4. CVE-2026-84142 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Internally found bugs present in Thunderbird 154. 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 and Thunderbird 155.

  5. CVE-2026-84141 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  6. CVE-2026-84140 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  7. CVE-2026-84139 6.1 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  8. CVE-2026-84138 6.5 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.

  9. CVE-2026-84137 4.3 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  10. CVE-2026-84136 6.1 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  11. CVE-2026-84135 9.8 Critique

    Mozilla Firefox · Mozilla firefox mobile

    Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.

  12. CVE-2026-84134 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Other issue in the Profile Backup component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  13. CVE-2026-84133 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  14. CVE-2026-84132 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  15. CVE-2026-84131 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    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.

  16. CVE-2026-84130 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  17. CVE-2026-84129 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  18. CVE-2026-84128 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.

  19. CVE-2026-84127 4.3 Moyenne

    Mozilla Firefox · Mozilla firefox mobile

    Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.

  20. CVE-2026-84126 4.3 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Incorrect boundary conditions in the Layout: Grid component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.

  21. CVE-2026-84125 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  22. CVE-2026-84124 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  23. CVE-2026-84123 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  24. CVE-2026-84122 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  25. CVE-2026-84121 9.6 Critique

    Mozilla Firefox · Mozilla Thunderbird

    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.

  26. CVE-2026-84120 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the Audio/Video 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.

  27. CVE-2026-84119 9.6 Critique

    Mozilla Firefox · Mozilla Thunderbird

    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.

  28. CVE-2026-84118 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

  29. CVE-2026-84117 8.8 Élevée

    Mozilla Firefox · Mozilla firefox mobile

    Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 155.