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CVE-2026-27856

🗓️ 27 Mar 2026 08:10:19Reported by OXType 
cve
 cve
🔗 web.nvd.nist.gov👁 15 Views🌐 WEB

CVE-2026-27856: Doveadm credential check is vulnerable to timing attacks; limit port and update.

Related
Detection
Affected
Refs
Paths
NVD
Node
dovecotdovecotRange<2.4.3
OR
open-xchangedovecotRange<2.3.22.1pro
OR
open-xchangedovecotRange3.0.03.0.5pro
OR
open-xchangedovecotRange3.1.03.1.4pro
[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "core"
    ],
    "product": "OX Dovecot Pro",
    "vendor": "Open-Xchange GmbH",
    "versions": [
      {
        "lessThanOrEqual": "2.3.0",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
Authorizationheader/doveadmTiming-based side-channel attack against Dovecot doveadm HTTP interface to extract credentials character by character.CWE-287

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29 Apr 2026 19:25Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.15.9 - 7.4
EPSS0.00029
SSVC
15