CVE-2026-34584 json
listmonk: Broken Access Control in CSV Import (Unauthorized List Assignment)
published 2026-04-02 7 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-18450
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nadh listmonk 6.1.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected products
- knadh listmonk
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/knadh/listmonk/commit/347f5976759232c36e571cf58b4bfe33c2794f35
patch
-
github.com
/knadh/listmonk/security/advisories/GHSA-85j8-5c6w-gcpv
patch, vendor-advisory
-
github.com
/knadh/listmonk/releases/tag/v6.1.0
product, release-notes
Sources
- CVE List CVE-2026-34584
- NVD CVE-2026-34584
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.