Two-factor enrollment bypass via AIA cancellation
Published Apr 29, 2025 · Updated Jan 29, 2026
Authentication bypass in Keycloak before 26.2.2 allows remote attackers to skip administrator-required actions during sign-in. The application-initiated-action cancellation path removes an administrator-assigned required action when a crafted sign-in URL parameter selects and then cancels that action. The account must already carry a required action; successful abuse bypasses controls such as two-factor enrollment without granting broader administrative access.
Summary
What happened
Authentication bypass in Keycloak before 26.2.2 allows remote attackers to skip administrator-required actions during sign-in. The application-initiated-action cancellation path removes an administrator-assigned required action when a crafted sign-in URL parameter selects and then cancels that action. The account must already carry a required action; successful abuse bypasses controls such as two-factor enrollment without granting broader administrative access.
The record
- CVE
- CVE-2025-3910
- Published
- Apr 29, 2025
- Updated
- Jan 29, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat build of Keycloak
- Classifications
- CWE-287, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 29, 2025CVE publishedPublication date reported by the CVE source.
- Jan 29, 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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