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CVE-2026-34828

7.1 · HIGH

listmonk is a standalone, self-hosted, newsletter and mailing list manager.

Published Apr 2, 2026CWE-613EPSS 0.37%

Overview

CVE-2026-34828 is a high-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/knadh/listmonk/commit/db82035d619348949512dafdaf60c86037cafc9eGitHubgithub.com/knadh/listmonk/releases/tag/v6.1.0GitHubgithub.com/knadh/listmonk/security/advisories/GHSA-h5j9-cvrw-v5qh

How CyberStrike helps

Frequently asked questions

What is CVE-2026-34828?

CVE-2026-34828 is a high-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-34828?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-34828?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-34828?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-34828 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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