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CVE-2026-4371 Out of bounds read in IMAP parsing

🗓️ 24 Mar 2026 20:27:15Reported by mozillaType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

CVE-2026-4371 out of bounds read in IMAP parsing may crash Thunderbird or leak data in versions below 149 and 140.9.

Related
Affected
Refs
[
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.9",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "149",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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