A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this
    by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This
    vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling
    unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible
    remotely via network access to the Admin API. (CVE-2026-37978)

Keycloak versions installed prior to 26.6.2 are affected by multiple vulnerabilities, including:

  - A flaw was found in Keycloak's redirect URI validation logic. An attacker can bypass     validation to redirect users to malicious sites, potentially leading to phishing attacks and     credential theft. (CVE-2026-7504)

  - A session fixation vulnerability exists in the OIDC login flow. An unauthenticated attacker     can pre-create sessions leading to account takeover if a user logs in using the attacker's     session. (CVE-2026-7507)

  - A flaw was found in Keycloak's SAML endpoint processing. A crafted XML request to the SAML     endpoint can cause a denial of service by consuming excessive server resources. (CVE-2026-7307)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
442653	SCA: security update for org.keycloak:keycloak-services (GHSA-rrv7-3mqf-hxfr)	Tenable Cloud Security	SCA Checks	medium
442653	SCA: security update for org.keycloak:keycloak-services (GHSA-rrv7-3mqf-hxfr)	Tenable Self-Hosted Container Security	SCA Checks	medium
316461	Keycloak < 26.6.2 Multiple Vulnerabilities	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-37978

medium

Tenable Plugins

medium

medium

medium