Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nadh | Listmonk | >= 4.1.0, < 6.1.0 |
Related Weaknesses (CWE)
References
- https://github.com/knadh/listmonk/commit/db82035d619348949512dafdaf60c86037cafc9Patch
- https://github.com/knadh/listmonk/releases/tag/v6.1.0ProductRelease Notes
- https://github.com/knadh/listmonk/security/advisories/GHSA-h5j9-cvrw-v5qhExploitVendor Advisory
FAQ
What is CVE-2026-34828?
CVE-2026-34828 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 sessio...
How severe is CVE-2026-34828?
CVE-2026-34828 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34828?
Check the references section above for vendor advisories and patch information. Affected products include: Nadh Listmonk.