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CVE-2026-109740 Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component

🗓️ 13 Oct 2026 12:29:26Reported by mozillaType 
cvelist
 cvelist
🔗 www.cve.org👁 18 Views

Sandbox escape in Firefox Widget: Win32 component due to incorrect boundary conditions.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-109740
13 Oct 202613:16
–circl
cve
CVE
CVE-2026-109740
13 Oct 202612:29
–cve
debiancve
Debian CVE
CVE-2026-109740
13 Oct 202612:29
–debiancve
euvd
EUVD
EUVD-2026-98502
13 Oct 202612:29
–euvd
mozilla
Mozilla
Security Vulnerabilities fixed in Firefox ESR 153.5 — Mozilla
13 Oct 202600:00
–mozilla
nvd
NVD
CVE-2026-109740
13 Oct 202613:17
–nvd
osv
OSV
DEBIAN-CVE-2026-109740
13 Oct 202613:17
–osv
ptsecurity
Positive Technologies
PT-2026-111461
13 Oct 202600:00
–ptsecurity
redhatcve
RedhatCVE
CVE-2026-109740
13 Oct 202618:44
–redhatcve
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "153.5",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "158",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "153.5",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "158",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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