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CVE-2026-74956

🗓️ 18 Aug 2026 12:23:37Reported by mozillaType 
cve
 cve
🔗 web.nvd.nist.gov👁 64 Views

Same-origin policy bypass in Firefox DOM: Service Workers fixed in Firefox 154 and ESR 153.1.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
alpinelinux
AlpineLinux
CVE-2026-74956
18 Aug 202612:23
alpinelinux
cgr
Chainguard
CVE-2026-74956 vulnerabilities
25 Aug 202620:27
cgr
circl
Circl
CVE-2026-74956
18 Aug 202620:40
circl
cvelist
Cvelist
CVE-2026-74956 Same-origin policy bypass in the DOM: Service Workers component
18 Aug 202612:23
cvelist
debiancve
Debian CVE
CVE-2026-74956
18 Aug 202612:23
debiancve
euvd
EUVD
EUVD-2026-60683
18 Aug 202612:23
euvd
nessus
Tenable Nessus
Fedora 43 : firefox (2026-170e9d62c6)
20 Aug 202600:00
nessus
nessus
Tenable Nessus
Fedora 44 : firefox (2026-fc11919789)
20 Aug 202600:00
nessus
nessus
Tenable Nessus
Mozilla Firefox ESR < 153.1
18 Aug 202600:00
nessus
nessus
Tenable Nessus
Mozilla Firefox < 154.0
18 Aug 202600:00
nessus
Rows per page
NVD
Node
OR
mozillafirefoxRange<153.1.0esr
mozillafirefoxRange<154.0.0-
mozillathunderbirdRange<153.1.0esr
mozillathunderbirdRange<154.0-
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "153.1",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "154",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "153.1",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "154",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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19 Aug 2026 01:00Current
5.2Medium risk
Vulners AI Score5.2
CVSS 3.19.1
EPSS0.00283
SSVC
64