PT-2026-29854 · Listmonk · Listmonk

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

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions listmonk versions 4.1.0 through 6.0.x

Description Bugs in list permission checks allow users in a multi-user environment with untrusted users to access lists they are not authorized to view under various scenarios.

Recommendations Update to version 6.1.0.

Exploit

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-34584

GHSA-85J8-5C6W-GCPV

Affected Products

Listmonk

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34584.json · Exploit
• https://github.com/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv · Vendor Advisory
• https://github.com/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35 · Patch
• https://osv.dev/vulnerability/CVE-2026-34584 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34584 · Security Note
• https://github.com/knadh/listmonk/releases/tag/v6.1.0 · Note