listmonk: Missing Critical Step in Authentication
CVE-2026-128333 is a high-severity missing critical step in authentication vulnerability in listmonk from Knadh, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 7.0.0-beta.2 as the first without the flaw, so updating listmonk to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.42% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update listmonk to 7.0.0-beta.2 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Knadh | listmonk | 6.0.0 up to, but not including, 7.0.0-beta.2 | 7.0.0-beta.2 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (vulncheck.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 9.1 | Critical | CNA (vulncheck.com) |
| CVSS 3.1 | 7.4 | High | CNA (vulncheck.com) |
Official description
listmonk 6.0.0 before 7.0.0-beta.2 contains an authentication bypass vulnerability in doResetPassword that skips TOTP verification after a password reset. Attackers who can complete a reset, such as by reading the victim's reset email, obtain fully authenticated sessions including Super Admin without the TOTP code.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Critical Step in Authentication
The product implements an authentication technique, but it skips a step that weakens the technique.
More Missing Critical Step in Authentication vulnerabilities (CWE-304)
Timeline
- CVE record published.
References
Patches and release notes
Other references
Other vulnerabilities in listmonk
- 7.4 High severity
- 7.1 High severity
Recent Missing Critical Step in Authentication vulnerabilities
- 8.8 High severity
- 9.4 Critical severity
- 7.7 High severity
- 8.1 High severity
- 9.8 Critical severity
- 8.8 High severity
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