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CVE-2026-84143 Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

🗓️ 01 Sep 2026 12:19:10Reported by mozillaType 
cvelist
 cvelist
🔗 www.cve.org👁 9 Views

Memory corruption bugs in Firefox 154 and ESR 153.1/140.14, fixed in Firefox 155/ESR 153.2/140.15.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-84143
1 Sep 202612:19
cve
debiancve
Debian CVE
CVE-2026-84143
1 Sep 202612:19
debiancve
euvd
EUVD
EUVD-2026-69091
1 Sep 202612:19
euvd
nvd
NVD
CVE-2026-84143
1 Sep 202613:20
nvd
osv
OSV
DEBIAN-CVE-2026-84143
1 Sep 202613:20
osv
osv
OSV
UBUNTU-CVE-2026-84143
1 Sep 202600:00
osv
ptsecurity
Positive Technologies
PT-2026-84196
1 Sep 202600:00
ptsecurity
ubuntucve
UbuntuCve
CVE-2026-84143
1 Sep 202600:00
ubuntucve
[
  {
    "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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