PT-2026-29854 · Knadh · Listmonk

Pratikkaran23 · Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-34584

NVD

CVSS v3.1

5.4

Medium

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-34584

Affected Products

Listmonk

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-34584 · Security Note
• https://github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv · Note
• https://github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35 · Note
• https://github.com/knadh/listmonk/releases/tag/v6.1.0 · Note