FKIE_CVE-2026-34584

Vulnerability from fkie_nvd - Published: 2026-04-02 18:16 - Updated: 2026-04-10 02:03
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Summary
listmonk is a standalone, self-hosted, newsletter and mailing list manager. From version 4.1.0 to before version 6.1.0, bugs in list permission checks allows users in a multi-user environment to access to lists (which they don't have access to) under different scenarios. This only affects multi-user environments with untrusted users. This issue has been patched in version 6.1.0.
References
security-advisories@github.comhttps://github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35Patch
security-advisories@github.comhttps://github.com/knadh/listmonk/releases/tag/v6.1.0Product, Release Notes
security-advisories@github.comhttps://github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpvPatch, Vendor Advisory
Impacted products
Vendor Product Version
nadh listmonk *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nadh:listmonk:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BB35DDE9-7F69-4344-A42C-C17C1F1D70A5",
              "versionEndExcluding": "6.1.0",
              "versionStartIncluding": "4.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "listmonk is a standalone, self-hosted, newsletter and mailing list manager. From version 4.1.0 to before version 6.1.0, bugs in list permission checks allows users in a multi-user environment to access to lists (which they don\u0027t have access to) under different scenarios. This only affects multi-user environments with untrusted users. This issue has been patched in version 6.1.0."
    }
  ],
  "id": "CVE-2026-34584",
  "lastModified": "2026-04-10T02:03:22.047",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-02T18:16:30.510",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/knadh/listmonk/releases/tag/v6.1.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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