CVE-2026-88895Network attack vector

Administrator MFA bypass via password-derived API tokens

Published Sep 10, 2026 · Updated Sep 10, 2026

Authentication bypass in CyberPanel before 3.0.5 allows remote authenticated users to bypass TOTP on administrative API endpoints. The standard API, cloud API, connection verification, API login, and panel-session handoff accept password-derived legacy tokens without enforcing account TOTP policy. Possession of an administrator password is required, after which administrative operations and authenticated panel sessions are available without the second factor.

CVSS severityUnavailable
Unscored
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in CyberPanel before 3.0.5 allows remote authenticated users to bypass TOTP on administrative API endpoints. The standard API, cloud API, connection verification, API login, and panel-session handoff accept password-derived legacy tokens without enforcing account TOTP policy. Possession of an administrator password is required, after which administrative operations and authenticated panel sessions are available without the second factor.

The record

CVE
CVE-2026-88895
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
CyberPanel
Product
CyberPanel
Classifications
T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CyberPanel · CyberPanelversion=0 <3.0.5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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