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CVE-2026-34828GHSA-H5J9-CVRW-V5QHGO-2026-5414

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.1.0, 1.1.1-0.20260329113754-1b5e8d38c778
1 proof of concept on GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • knadh listmonk

    From 4.1.0 · fixed in 6.1.0

  • github.com/knadh/listmonkGo

    From 1.1.1-0.20241028090858-319053dd7a90 · fixed in 1.1.1-0.20260329113754-1b5e8d38c778

References 4

GitHub · knadh/listmonk

GitHub · 0xmrma/CVE-2026-34828