CVE-2026-34584
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductNadh Listmonk
PublishedApr 2, 2026
First seenApr 2, 2026
How to fix
Update
- nadh listmonk6.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nadh listmonk | 4.1.0 ≤ v < 6.1.0 | 6.1.0 |
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