CVE-2026-34584: 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…

PriorityP430medium5.4CVSS 3.1

AVNACLPRLUINSUCLILAN

EPSS

0.17%

6.8th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
knadh	listmonk	—	—
nadh	listmonk	>= 4.1.0 < 6.1.0	6.1.0

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