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  4. CVE 2026 109081 keycloak services keycloak services injection of
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Back to active CVEs
Medium · CVSS 6.8CVE-2026-109081

Keycloak-services: keycloak-services: injection of roles into realm default-roles via dcr endpointCVE-2026-109081

Answer in brief

CVE-2026-109081 records a Medium severity (CVSS 6.8) vulnerability in Keycloak-services: keycloak-services: injection of roles into realm default-roles via dcr endpoint. The current sources do not mark it as known exploited. The current feed maps Red Hat/keycloak-services (generic), Red Hat/rhbk/keycloak-rhel9 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/keycloak-services (generic), Red Hat/rhbk/keycloak-rhel9 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/keycloak-servicesgeneric*Not reported
Red Hat/rhbk/keycloak-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/keycloak-services, Red Hat/rhbk/keycloak-rhel9.
  2. 2Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Evidence timeline and material changes

  1. Published upstream

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
Upstream source description

A flaw was found in Keycloak. The Dynamic Client Registration (DCR) endpoint does not properly validate authorization when processing the deprecated defaultRoles field. An authenticated attacker with client creation privileges or an Initial Access Token (IAT) can inject excessive roles into the realm's default roles configuration. This causes clients across the realm to generate bloated access tokens, resulting in performance and memory degradation that can lead to a Denial of Service (DoS).

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Keycloak-services: keycloak-services: oidc logout endpoint session fixation via id_token_hint leading to account takeoverSame red hat/keycloak-services package
  • Keycloak-services: keycloak-services: admin api missing audience checkSame red hat/keycloak-services package
  • Keycloak-services: keycloak-services: saml broker ignores proxyrestriction delegation constraintsSame red hat/keycloak-services package
  • Keycloak-services: keycloak-services: stateless token preferred_username fallback enables identity rebindingSame red hat/keycloak-services package
  • Keycloak-services: keycloak-services: indefinite access token renewal via standard token exchange v2Same red hat/keycloak-services package
  • Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.rolesSame red hat/keycloak-services package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-862
Source
CVE List V5
Source checked
Nov 6, 2026
References
1 linked source
Open source record