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CVE-2026-2776

🗓️ 24 Feb 2026 13:33:12Reported by mozillaType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 9 Views

Sandbox escape in External Software Telemetry affects Firefox below 148 and release 115.33.

Related
Detection
Affected
Refs
Social
NVD
Node
mozillafirefoxRange<115.33.0esr
OR
mozillafirefoxRange<148.0-
OR
mozillafirefoxRange128.0140.8.0esr
OR
mozillathunderbirdRange<140.8.0esr
OR
mozillathunderbirdRange<148.0-
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "115.33",
        "lessThanOrEqual": "115.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "140.8",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "148",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.8",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "148",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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13 Apr 2026 15:17Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.110
EPSS0.00029
SSVC
9