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CVE-2026-103500 Heap buffer overflow opening large email

🗓️ 30 Sep 2026 17:15:06Reported by mozillaType 
cvelist
 cvelist
🔗 www.cve.org👁 5 Views

Heap buffer overflow in Thunderbird when opening emails 2GB or larger.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-103500
30 Sep 202617:15
–cve
euvd
EUVD
EUVD-2026-90200
30 Sep 202617:15
–euvd
mozilla
Mozilla
Security Vulnerabilities fixed in Thunderbird 157 — Mozilla
30 Sep 202600:00
–mozilla
mozilla
Mozilla
Security Vulnerabilities fixed in Thunderbird 140.17 — Mozilla
30 Sep 202600:00
–mozilla
mozilla
Mozilla
Security Vulnerabilities fixed in Thunderbird 153.4 — Mozilla
30 Sep 202600:00
–mozilla
nvd
NVD
CVE-2026-103500
30 Sep 202618:18
–nvd
redhatcve
RedhatCVE
CVE-2026-103500
30 Sep 202619:02
–redhatcve
[
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.17",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "153.4",
        "lessThanOrEqual": "153.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "157",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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30 Sep 2026 17:19Current
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