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CVE-2026-34828

HighPublished

listmonk: Active sessions remain valid after password reset and password change

Published: Apr 2, 2026
Updated: Apr 3, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 18, 2026

Primary CVSS

7.1/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 22.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-34828PoC
listmonk’s Session Persistence After Password Reset and Password Change

Responsible use

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