6.8 Medium

CVE-2026-96445 Keycloak-services: keycloak-services: conditional otp skip-header policy evaluated against untrusted proxy headers

Description

A flaw was found in the Conditional OTP authenticator of Keycloak, an identity and access management solution. The issue occurs when the system evaluates specific HTTP headers to determine if a one-time password (OTP) should be skipped, but fails to verify if those headers came from a trusted source. This could allow an attacker who already has a user's password to bypass the second-factor authentication by providing a specially crafted header in their request.

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: High
Privileges required: Low
Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Build of Keycloak	Versions not published
Red Hat Single Sign-On 7	Versions not published
Red Hat build of Keycloak 26.6.8	Versions not published

References

RHSA-2026:95761 access.redhat.com
access.redhat.com access.redhat.com
RHBZ#2539280 bugzilla.redhat.com

Timeline

Published September 23, 2026
Last modified November 6, 2026

The 276 CVEs of Red Hat Build of Keycloak →

CVE-2026-9797 Keycloak: keycloak: privilege escalation via client authentication manipulation by an authenticated administrator 6.5 Medium CVE-2026-97848 Keycloak-services: keycloak-services: protocol mapper with jsontype=json bypasses token sanitization 6.5 Medium CVE-2026-97367 Keycloak-services: keycloak-services: dcr azp and sid claim substitution allows account rest session takeover 6.4 Medium CVE-2026-96547 Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles 6.5 Medium

Track this CVE