CVE-2026-3429
Medium · 4.2CVSS
4.2
EPSS
0.3%
Published
Mar 11, 2026
CISA due date
—
The record
A flaw was identified in the Account REST API of Keycloak that allows a user authenticated at a lower security level to perform sensitive actions intended only for higher-assurance sessions. Specifically, an attacker who has already obtained a victim’s password can delete the victim’s registered MFA/OTP credential without first proving possession of that factor. The attacker can then register their own MFA device, effectively taking full control of the account. This weakness undermines the intended protection provided by multi-factor authentication.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Chainguard | keycloak-26.5 | 0 | 26.5.6-r0 |
| Chainguard | keycloak-26.5-iamguarded-compat | 0 | 26.5.6-r0 |
| Chainguard | keycloak-fips-26.5 | 0 | 26.5.6-r0 |
| Chainguard | keycloak-fips-26.5-iamguarded-fips | 0 | 26.5.6-r0 |
| Wolfi | keycloak-26.5 | 0 | 26.5.6-r0 |
| Wolfi | keycloak-26.5-iamguarded-compat | 0 | 26.5.6-r0 |
Related vulnerabilities
- CVE-2026-33871 Netty is an asynchronous, event-driven network application framework. Also affects keycloak-26.5
- CVE-2026-33870 Netty is an asynchronous, event-driven network application framework. Also affects keycloak-26.5
- CVE-2026-3911 A flaw was found in Keycloak. Also affects keycloak-26.5
- CVE-2026-1190 A flaw was found in Keycloak's SAML brokering functionality. Also affects keycloak-26.5
- CVE-2025-14559 A flaw was found in the keycloak-services component of Keycloak. Also affects keycloak-26.5
- CVE-2025-66560 Quarkus is a Cloud Native, (Linux) Container First framework for writing Java… Also affects keycloak-26.5
- CVE-2026-114574 A security vulnerability has been detected in massCodeIO massCode 5.10. CWE-284
- CVE-2026-83395 Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise… CWE-284