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CVE-2026-27651

🗓️ 24 Mar 2026 14:13:27Reported by f5Type 
cve
 cve
🔗 web.nvd.nist.gov👁 77 Views

The nginx mail authentication module may terminate workers when CRAM-MD5 or APOP is enabled and the auth server retries with Auth-Wait.

Related
Detection
Affected
Refs
NVD
Node
f5nginx_open_sourceRange0.5.150.9.7
OR
f5nginx_open_sourceRange1.0.01.28.3
OR
f5nginx_open_sourceRange1.29.01.29.7
OR
f5nginx_plusRanger33r35
OR
f5nginx_plusMatchr32-
OR
f5nginx_plusMatchr32p1
OR
f5nginx_plusMatchr32p2
OR
f5nginx_plusMatchr32p3
OR
f5nginx_plusMatchr32p4
OR
f5nginx_plusMatchr35-
OR
f5nginx_plusMatchr35p1
OR
f5nginx_plusMatchr36-
OR
f5nginx_plusMatchr36p1
OR
f5nginx_plusMatchr36p2
[
  {
    "vendor": "F5",
    "product": "NGINX Open Source",
    "modules": [
      "ngx_mail_auth_http_module"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "1.29.0",
        "lessThan": "1.29.7",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "0.5.15",
        "lessThan": "1.28.3",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "F5",
    "product": "NGINX Plus",
    "modules": [
      "ngx_mail_auth_http_module"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "R36",
        "lessThan": "R36 P3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R35",
        "lessThan": "R35 P2",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R34",
        "lessThan": "*",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R33",
        "lessThan": "*",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R32",
        "lessThan": "R32 P5",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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30 Mar 2026 14:02Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
CVSS 48.7
EPSS0.00064
SSVC
77