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CVE-2026-40017

🗓️ 28 Aug 2026 10:12:19Reported by OXType 
cve
 cve
🔗 web.nvd.nist.gov👁 5 Views

Crafted mail headers cause hash collision in IMAP THREAD enabling CPU DoS.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cvelist
Cvelist
CVE-2026-40017
28 Aug 202610:12
cvelist
euvd
EUVD
EUVD-2026-67666
28 Aug 202610:12
euvd
nvd
NVD
CVE-2026-40017
28 Aug 202612:16
nvd
ptsecurity
Positive Technologies
PT-2026-83059
28 Aug 202600:00
ptsecurity
vulnrichment
Vulnrichment
CVE-2026-40017
28 Aug 202610:12
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "core"
    ],
    "product": "OX Dovecot Pro",
    "vendor": "Open-Xchange GmbH",
    "versions": [
      {
        "lessThan": "2.3.22.2",
        "status": "affected",
        "version": "2.3.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.0.7",
        "status": "affected",
        "version": "3.0.0",
        "versionType": "semver"
      },
      {
        "lessThan": "3.1.6",
        "status": "affected",
        "version": "3.1.0",
        "versionType": "semver"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "modules": [
      "core"
    ],
    "product": "OX Dovecot CE",
    "vendor": "Open-Xchange GmbH",
    "versions": [
      {
        "lessThan": "2.4.5",
        "status": "affected",
        "version": "2.3.0",
        "versionType": "semver"
      }
    ]
  }
]

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28 Aug 2026 16:17Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.16.5
SSVC
5