What’s Vulnerable › Vulnerabilities

CVE-2025-3910: Org.keycloak.authentication: two factor authentication bypass

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-29 · updated 2026-09-21
• Weakness: CWE-287

Description

A flaw was found in Keycloak. The org.keycloak.authorization package may be vulnerable to circumventing required actions, allowing users to circumvent requirements such as setting up two-factor authentication.

Affected products

• Red Hat build of Keycloak 26.4: from 26.0 before 26.0.11 — fixed in 26.0.11

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.0.11. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2025:4335
• https://access.redhat.com/errata/RHSA-2025:4336
• https://access.redhat.com/security/cve/CVE-2025-3910
• https://bugzilla.redhat.com/show_bug.cgi?id=2361923
• https://github.com/keycloak/keycloak/issues/39349

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