Veille CVE

Mardi 18 août 2026

58 CVE

Critique 17 Élevée 26 Moyenne 15 Faible 0 Non évaluée 0 Exploitées (KEV) Tri : plus récentes « mozilla firefox » ✕
  1. CVE-2026-75874 10.0 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 140.15, and Thunderbird 153.2.

  2. CVE-2026-74990 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 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 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  3. CVE-2026-74989 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Internally found bugs present in Thunderbird 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.

  4. CVE-2026-74988 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 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.

  5. CVE-2026-74987 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 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 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  6. CVE-2026-74986 9.1 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  7. CVE-2026-74985 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  8. CVE-2026-74984 6.8 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Race condition in the JavaScript Engine component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  9. CVE-2026-74983 8.1 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  10. CVE-2026-74982 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  11. CVE-2026-74981 8.1 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  12. CVE-2026-74980 6.5 Moyenne

    Mozilla Firefox · Mozilla firefox mobile

    Clickjacking issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.

  13. CVE-2026-74979 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  14. CVE-2026-74978 8.1 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  15. CVE-2026-74977 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  16. CVE-2026-74976 6.5 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  17. CVE-2026-74975 5.4 Moyenne

    Mozilla Firefox · Mozilla firefox mobile

    Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.

  18. CVE-2026-74974 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Same-origin policy bypass in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  19. CVE-2026-74973 4.2 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  20. CVE-2026-74972 4.3 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  21. CVE-2026-74971 4.3 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  22. CVE-2026-74970 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  23. CVE-2026-74969 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  24. CVE-2026-74968 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  25. CVE-2026-74967 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Same-origin policy bypass in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  26. CVE-2026-74966 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  27. CVE-2026-74965 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Shell Integration component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  28. CVE-2026-74964 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  29. CVE-2026-74963 5.4 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  30. CVE-2026-74962 8.1 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  31. CVE-2026-74961 9.1 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  32. CVE-2026-74960 8.1 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  33. CVE-2026-74959 9.1 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Mitigation bypass in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  34. CVE-2026-74958 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  35. CVE-2026-74957 8.1 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Mitigation bypass in the Safe Browsing component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  36. CVE-2026-74956 9.1 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  37. CVE-2026-74955 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Request Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  38. CVE-2026-74954 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  39. CVE-2026-74953 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  40. CVE-2026-74952 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 153.2, and Thunderbird 153.2.

  41. CVE-2026-74951 6.5 Moyenne

    Mozilla Firefox · Mozilla firefox mobile

    Clickjacking issue in Firefox for Android. This vulnerability was fixed in Firefox 154.

  42. CVE-2026-74950 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Downloads API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  43. CVE-2026-74949 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  44. CVE-2026-74948 6.5 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  45. CVE-2026-74947 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  46. CVE-2026-74946 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  47. CVE-2026-74945 6.5 Moyenne

    Mozilla Firefox · Mozilla Thunderbird

    Information disclosure in the Graphics: Text component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  48. CVE-2026-74944 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  49. CVE-2026-74943 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  50. CVE-2026-74942 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  51. CVE-2026-74941 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  52. CVE-2026-74940 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  53. CVE-2026-74939 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  54. CVE-2026-74938 9.1 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  55. CVE-2026-74937 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

  56. CVE-2026-74936 9.8 Critique

    Mozilla Firefox · Mozilla Thunderbird

    Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  57. CVE-2026-74935 8.8 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Privilege escalation in the DOM: Networking component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

  58. CVE-2026-74934 7.5 Élevée

    Mozilla Firefox · Mozilla Thunderbird

    Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.