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CVE-2026-8949

🗓️ 19 May 2026 12:29:40Reported by mozillaType 
cve
 cve
🔗 web.nvd.nist.gov👁 11 Views

CVE-2026-8949 describes an integer overflow in the Widget Win32 component fixed in Firefox 151 and Firefox 140.11.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-8949
19 May 202612:29
attackerkb
AlpineLinux
CVE-2026-8949
19 May 202612:29
alpinelinux
Circl
CVE-2026-8949
19 May 202620:00
circl
CNNVD
Mozilla多款产品 输入验证错误漏洞
19 May 202600:00
cnnvd
Cvelist
CVE-2026-8949 Integer overflow in the Widget: Win32 component
19 May 202612:29
cvelist
Debian CVE
CVE-2026-8949
19 May 202612:29
debiancve
EUVD
EUVD-2026-30899
19 May 202612:29
euvd
Tenable Nessus
Fedora 42 : firefox / nss (2026-7f6ee801e2)
25 May 202600:00
nessus
Tenable Nessus
Fedora 43 : firefox / nss (2026-cd20332935)
20 May 202600:00
nessus
Tenable Nessus
Fedora 44 : firefox (2026-f3409cf313)
20 May 202600:00
nessus
Rows per page
NVD
Node
mozillafirefoxRange<140.11.0esr
OR
mozillafirefoxRange<151.0.0-
OR
mozillathunderbirdRange<140.11esr
OR
mozillathunderbirdRange<151.0.0
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.11",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "151",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.11",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "151",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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17 Jun 2026 11:04Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.5
EPSS0.00583
SSVC
11