How severe is CVE-2026-8922?

CVE-2026-8922 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-8922 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-8922?

CVE-2026-8922 affects Redhat Build Of Keycloak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-8922?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-8922 have an EU (EUVD) identifier?

Yes. CVE-2026-8922 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30843.

When was CVE-2026-8922 published?

CVE-2026-8922 was published on 2026-05-19 and last updated on 2026-07-23.

CVE-2026-8922

CVE-2026-8922 is a medium-severity vulnerability in Redhat Build Of Keycloak with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-303.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30843
Weakness: CWE-303
Affected product: Redhat Build Of Keycloak
Published: 2026-05-19
Last modified: 2026-07-23

Description

A flaw was found in Keycloak. When both realm-level and client-level `notBefore` revocation policies are configured, Keycloak's OpenID Connect (OIDC) Introspection feature fails to properly honor the realm-level policy. This allows tokens that should have been revoked to remain active, potentially leading to unauthorized access or continued session validity. This could impact the security of systems utilizing Keycloak for identity and access management.

Frequently asked questions

What is CVE-2026-8922?: A flaw was found in Keycloak. When both realm-level and client-level `notBefore` revocation policies are configured, Keycloak's OpenID Connect (OIDC) Introspection feature fails to properly honor the realm-level policy. This allows tokens that should have been revoked to remain active, potentially leading to unauthorized access or continued session validity. This could impact the security of systems utilizing Keycloak for identity and access management.
How severe is CVE-2026-8922?: CVE-2026-8922 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-8922 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-8922?: CVE-2026-8922 affects Redhat Build Of Keycloak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-8922?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-8922 have an EU (EUVD) identifier?: Yes. CVE-2026-8922 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30843.
When was CVE-2026-8922 published?: CVE-2026-8922 was published on 2026-05-19 and last updated on 2026-07-23.

References

Affected products (1)

cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*

More vulnerabilities in Redhat Build Of Keycloak

CVE-2026-15572 — High (CVSS 8.8): A flaw was found in Keycloak's Dynamic Client Registration (DCR) security policy management. The "Allowed Protocol…
CVE-2026-3047 — High (CVSS 8.8): A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is…
CVE-2026-16102 — High (CVSS 8.1): A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management…
CVE-2026-15573 — High (CVSS 8.1): A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security…
CVE-2026-1609 — High (CVSS 8.1): A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user…
CVE-2026-11800 — High (CVSS 8.1): A flaw was found in Keycloak. This JWT algorithm confusion vulnerability in the JWT Authorization Grant flow allows an…

All CVEs affecting Redhat Build Of Keycloak →

Other CWE-303 vulnerabilities

CVE-2025-13390 — Critical (CVSS 10.0): The WP Directory Kit plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including,…
CVE-2025-12421 — Critical (CVSS 9.9): Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that…
CVE-2025-12419 — Critical (CVSS 9.9): Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly…
CVE-2026-59309 — Critical (CVSS 9.8): VMware vCenter contains an authentication bypass vulnerability in the VMware Directory Service. A malicious actor with…
CVE-2025-66489 — Critical (CVSS 9.8): Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker…
CVE-2025-21311 — Critical (CVSS 9.8): Windows NTLM V1 Elevation of Privilege Vulnerability

Browse all CWE-303 vulnerabilities →