6 Nov 2026 19:02:40 UTC
Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens
cve-program · CVE-2026-97174 · Published
CVE-2026-97174
Red Hat build of Keycloak 26.6 · Vulnerability
CVSS 3.1 6.8 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-97174
PublishedA flaw was found in the Client-Initiated Backchannel Authentication (CIBA) implementation of Keycloak. The CIBA endpoint fails to properly validate the sub parameter, allowing it to be stored as an additional request parameter. During the token issuance process, this injected value overwrites the legitimate subject identifier. This allows an attacker to authenticate as themselves but receive security tokens belonging to a different victim user, leading to unauthorized account access.
Read the publisher's advisoryAffected versions, risk and source history
Exploitation and risk
Source statusCISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.
Which CVEs have scores here?
This view includes predictions for CVE identifiers explicitly listed in public NuGet advisories. Microsoft release pages have their own prediction coverage. Check source status for the scope and latest checks.
No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.
Risk history
Compare earlier KEV listings and daily EPSS scores. Advisory wording and affected versions have a separate history.
When does an EPSS score appear as a change?
A prediction change is reported when EPSS rises from below 10% to 10% or higher. Other daily score changes remain in this history.
Advisory history
4 saved versionsSee how the publisher's advisory changed over time. Each link opens the version saved at that time. The publisher's update date can differ from the date shown here.
How advisory history works
Each link identifies one complete publisher record. History can include advisories that previously shared an identifier; an identifier removed by a publisher no longer establishes a current relationship. A historical link shows only that record and earlier saved versions. Failed checks and unchanged reads do not create new versions.
6 Nov 2026 12:03:43 UTC
Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens
cve-program · CVE-2026-97174 · Published
5 Nov 2026 21:36:21 UTC
Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens
cve-program · CVE-2026-97174 · Published
5 Nov 2026 18:36:21 UTC
Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens
cve-program · CVE-2026-97174 · Published