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CVE-2026-6785 Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150

🗓️ 21 Apr 2026 12:41:13Reported by mozillaType 
cvelist
 cvelist
🔗 www.cve.org👁 45 Views

Memory safety bugs fixed in Firefox ESR 115.35 and 140.10, Thunderbird ESR 140.10, Firefox 150, and Thunderbird 150.

Related
Affected
Refs
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "115.35",
        "lessThanOrEqual": "115.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "140.10",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "150",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.10",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "150",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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21 Apr 2026 23:35Current
EPSS0.00017
45