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CVE-2026-84122

🗓️ 01 Sep 2026 12:18:49Reported by mozillaType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 35 Views

Use-after-free in Firefox Audio/Video component fixed in Firefox 155, ESR 140.15, ESR 153.2.

Related
Detection
Affected
Refs
Social
ReporterTitlePublishedViews
Family
alpinelinux
AlpineLinux
CVE-2026-84122
1 Sep 202612:18
alpinelinux
cgr
Chainguard
CVE-2026-84122 vulnerabilities
5 Sep 202602:17
cgr
circl
Circl
CVE-2026-84122
2 Sep 202604:48
circl
cvelist
Cvelist
CVE-2026-84122 Use-after-free in the Audio/Video component
1 Sep 202612:18
cvelist
debian
Debian
[SECURITY] [DLA 4770-1] firefox-esr security update
4 Sep 202608:03
debian
debian
Debian
[SECURITY] [DLA 4775-1] thunderbird security update
7 Sep 202610:00
debian
debian
Debian
[SECURITY] [DSA 6481-1] firefox-esr security update
2 Sep 202620:59
debian
debian
Debian
[SECURITY] [DSA 6483-1] thunderbird security update
4 Sep 202618:04
debian
debiancve
Debian CVE
CVE-2026-84122
1 Sep 202612:18
debiancve
nessus
Tenable Nessus
Debian dla-4770 : firefox-esr - security update
4 Sep 202600:00
nessus
Rows per page
NVD
Node
OR
mozillafirefoxRange<140.15.0
mozillafirefoxRange141.0.0153.2.0
mozillafirefoxRange154.0.0155.0.0
mozillathunderbirdRange<140.15.0
mozillathunderbirdRange141.0153.2.0
mozillathunderbirdRange154.0155.0
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.15",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "153.2",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "155",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.15",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "153.2",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "155",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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02 Sep 2026 15:01Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.4
EPSS0.00214
SSVC
35