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CVE-2026-40205

🗓️ 28 Aug 2026 10:12:24Reported by OXType 
cve
 cve
🔗 web.nvd.nist.gov👁 43 Views

OAuth2 remote validation accepts partial-scope tokens, bypassing authorization policy.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
alpinelinux
AlpineLinux
CVE-2026-40205
28 Aug 202610:12
–alpinelinux
cvelist
Cvelist
CVE-2026-40205
28 Aug 202610:12
–cvelist
debian
Debian
[SECURITY] [DLA 4873-1] dovecot security update
31 Oct 202614:35
–debian
debian
Debian
[SECURITY] [DSA 6526-1] dovecot security update
28 Sep 202618:42
–debian
debiancve
Debian CVE
CVE-2026-40205
28 Aug 202610:12
–debiancve
nessus
Tenable Nessus
Debian dla-4873 : dovecot-auth-lua - security update
31 Oct 202600:00
–nessus
nessus
Tenable Nessus
Debian dsa-6526 : dovecot-auth-lua - security update
29 Sep 202600:00
–nessus
nessus
Tenable Nessus
Fedora 44 : dovecot (2026-2e6b786570)
18 Sep 202600:00
–nessus
nessus
Tenable Nessus
Fedora 45 : dovecot (2026-8b8efbd2b8)
18 Sep 202600:00
–nessus
nessus
Tenable Nessus
Fedora 43 : dovecot (2026-e8a6485109)
18 Sep 202600:00
–nessus
Rows per page
Vulners
Node
OR
open-xchangedovecotRange2.3.11.2–2.3.22.2pro
open-xchangedovecotRange3.0.0–3.0.7pro
open-xchangedovecotRange3.1.0–3.1.6pro
open-xchangeox_dovecotRange2.3.11.2–2.4.5ce
[
  {
    "defaultStatus": "unaffected",
    "modules": [
      "core"
    ],
    "product": "OX Dovecot Pro",
    "vendor": "Open-Xchange GmbH",
    "versions": [
      {
        "lessThan": "2.3.22.2",
        "status": "affected",
        "version": "2.3.11.2",
        "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": "2.3.11.2",
        "versionType": "semver"
      }
    ]
  }
]

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03 Sep 2026 18:13Current
7High risk
Vulners AI Score7
CVSS 3.15.9
EPSS0.00211
SSVC
43