Listmonk 6.0.0 before 7.0.0-beta.2 contains a 2FA bypass vulnerability that allows attackers with a valid password to brute-force TOTP…
CVE-2026-128332
Listmonk 6.0.0 before 7.0.0-beta.2 contains a 2FA bypass vulnerability that allows attackers with a valid password to brute-force TOTP codes because the attempt counter resets on every new password login. Attackers can repeatedly submit credentials to POST /admin/login to obtain fresh tokens, each allowing 15 more guesses, gaining sessions for 2FA-protected accounts including Super Admin.
Assessment
- CVSS
- 9.1 (v4.0)
- Severity
- Critical
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 13 November 2026
- Last updated
- 13 November 2026
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
At the source
References
- https://github.com/knadh/listmonk/commit/3f62a55c13dbc679b29238e890e4b90d6d4996d8
- https://github.com/knadh/listmonk/releases/tag/v7.0.0-beta.2
- https://github.com/knadh/listmonk/blob/v7.0.0-beta.1/internal/tmptokens/tmptokens.go#L13-L88
- https://github.com/knadh/listmonk/blob/v7.0.0-beta.1/cmd/auth.go#L514-L568
- https://www.vulncheck.com/advisories/listmonk-6.0.0-before-7.0.0-beta.2-totp-brute-force-via-admin-login-twofa
- https://nvd.nist.gov/vuln/detail/CVE-2026-128332
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