CVE-2026-40178
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedajenti.plugin.core defines all necessary core elements to allow Ajenti to run properly. Prior to 0.112, if the 2FA was activated, it was possible during a short moment after the authentication of an user to bypass its authentication. This vulnerability is fixed in 0.112.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceIn Ajenti core plugin before version 0.112, when two-factor authentication (2FA) is enabled, an authentication bypass exists during a brief window immediately after a user authenticates. An attacker could potentially bypass the 2FA requirement during this timing vulnerability.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 0.112CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Determine the installed Ajenti core plugin versionRun the command to retrieve the installed version of the Ajenti Plugin Core package (e.g., pip show ajenti.plugin.core or equivalent package manager command for your installation)Affected if The displayed version is lower than 0.112
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Verify if two-factor authentication is enabledCheck the Ajenti configuration or user settings to determine whether 2FA is active for any user accountAffected if 2FA is enabled for at least one user in the Ajenti instance
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Confirm the vulnerability window existsInspect authentication logs or session handling configuration for any evidence of the timing window between initial authentication and 2FA verification completionAffected if The system shows authentication events where the 2FA step may not be consistently enforced immediately after credentials are validated
The environment is affected if Ajenti core plugin version is below 0.112 AND two-factor authentication is enabled, creating a potential window where the 2FA requirement could be bypassed after initial credential validation.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped0.112
Upgrade Ajenti to version 0.112 or later which contains the fix for this 2FA bypass vulnerability.
0.112
- Check the currently installed version of ajenti.plugin.core using your package manager (e.g., pip show ajenti.plugin.core or equivalent)
- Upgrade ajenti.plugin.core to version 0.112 or later using your package manager (e.g., pip install ajenti.plugin.core>=0.112)
- Restart the Ajenti service to ensure the updated plugin is loaded
- Verify the upgrade was successful by checking the installed version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-40178 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-40178 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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