CVE-2026-34828 HIGH

CVE-2026-34828: listmonk: Active sessions remain valid after password reset and password change

Vendor Knadh
Product listmonk
Weakness CWE-613 · Insufficient session expiration
Published April 2, 2026
Last update April 3, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

listmonk is a standalone, self-hosted, newsletter and mailing list manager. From version 4.1.0 to before version 6.1.0, a session management vulnerability allows previously issued authenticated sessions to remain valid after sensitive account security changes, specifically password reset and password change. As a result, an attacker who has already obtained a valid session cookie can retain access to the account even after the victim changes or resets their password. This weakens account recovery and session security guarantees. This issue has been patched in version 6.1.0.

Key dates

02Disclosure timeline

April 2, 2026 CVE published
April 3, 2026 Record updated