CVE-2026-34584

MEDIUM EPSS 6.8%
Published Apr 2, 20263mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Apr 2, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.4
Exploitability
2.8
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
6.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-639

Affected Products 1

VendorProductVersionRange
nadhlistmonk*≥4.1.0  –  <6.1.0

References 3

  • github.com https://github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35
    Patch
  • github.com https://github.com/knadh/listmonk/releases/tag/v6.1.0
    ProductRelease Notes
  • github.com https://github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv
    PatchVendor Advisory

Remediation

  • github.com https://github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35
    Patch
  • github.com https://github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv
    PatchVendor Advisory