CVE-2026-34584— listmonk: Broken Access Control in CSV Import (Unauthorized List Assignment)
Quick assessment
Affected
knadh listmonk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
listmonk是Kailash Nadh个人开发者的一个具有现代仪表板的高性能、自托管、时事通讯和邮件列表管理器。 listmonk 4.1.0版本至6.1.0之前版本存在安全漏洞，该漏洞源于列表权限检查存在缺陷，可能导致多用户环境中的用户访问其无权访问的列表。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2026-34584
Vulnerability Information
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Vulnerability Title
listmonk: Broken Access Control in CSV Import (Unauthorized List Assignment)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
listmonk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
listmonk是Kailash Nadh个人开发者的一个具有现代仪表板的高性能、自托管、时事通讯和邮件列表管理器。 listmonk 4.1.0版本至6.1.0之前版本存在安全漏洞，该漏洞源于列表权限检查存在缺陷，可能导致多用户环境中的用户访问其无权访问的列表。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-34584
| # | POC Description | Source Link | Shenlong Link |
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Patches & Fixes for CVE-2026-34584 (1)
Vendor Advisories for CVE-2026-34584 (1)
IV. Related Vulnerabilities
Same product: listmonk
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CVE-2026-62361
listmonk: SQL Injection in `/api/subscribers/export` bypasse -
CVE-2026-34828
listmonk: Active sessions remain valid after password reset -
CVE-2026-21483
listmonk Vulnerable to Stored XSS Leading to Admin Account T -
CVE-2025-58430
listmonk Vulnerable to CSRF to XSS Chain That Can Lead to Ad -
CVE-2025-49136
listmonk's Sprig template Injection vulnerability leads to r
Same vendor: knadh
-
CVE-2026-62361
listmonk: SQL Injection in `/api/subscribers/export` bypasse -
CVE-2026-34828
listmonk: Active sessions remain valid after password reset -
CVE-2026-21483
listmonk Vulnerable to Stored XSS Leading to Admin Account T -
CVE-2025-58430
listmonk Vulnerable to CSRF to XSS Chain That Can Lead to Ad -
CVE-2025-49136
listmonk's Sprig template Injection vulnerability leads to r
Same weakness: CWE-639
-
CVE-2026-104969
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Plane: Cross-workspace association destruction and issue mut -
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CVE-2026-104965
Plane: Cross-Tenant Issue Relation Creation via IDOR -
CVE-2026-104964
Plane: Cross-Workspace Project Modification via Unscoped Pro
V. Comments for CVE-2026-34584
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