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CVE-2026-6751

🗓️ 21 Apr 2026 12:40:48Reported by mozillaType 
cve
 cve
🔗 web.nvd.nist.gov👁 32 Views

Uninitialized memory in Web Codecs component fixed in Firefox 150 and Firefox ESR 140.10.

Related
Detection
Affected
Refs
NVD
Node
mozillafirefoxRange<140.10.0esr
OR
mozillafirefoxRange<150.0-
OR
mozillathunderbirdRange140.0140.10.0esr
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "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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22 Apr 2026 16:08Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.3
EPSS0.00063
SSVC
32