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  4. CVE 2026 18967 keycloak services keycloak services saml
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Back to active CVEs
Medium · CVSS 6.4CVE-2026-18967

Keycloak-services: keycloak-services: saml onetimeuse assertion replay in idp-initiated broker flowCVE-2026-18967

Answer in brief

CVE-2026-18967 records a Medium severity (CVSS 6.4) vulnerability in Keycloak-services: keycloak-services: saml onetimeuse assertion replay in idp-initiated broker flow. The current sources do not mark it as known exploited. The current feed maps Red Hat/keycloak-services (generic), Red Hat/rhbk-keycloak-rhel9/rhbk-keycloak-rhel9 (generic), Red Hat/rhbk-openshift-rhel9/rhbk-openshift-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 Aug 6, 2026Updated Aug 10, 2026Source checked Nov 4, 2026First seen by HOL Aug 6, 2026Material review Aug 10, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.4
Exploitation
Not marked as known exploited
Affected software
5 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.4. 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/rhbk-keycloak-rhel9 (generic), Red Hat/rhbk-openshift-rhel9/rhbk-openshift-rhel9 (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/keycloak-servicesgeneric*Not reported
Red Hat/rhbk-keycloak-rhel9/rhbk-keycloak-rhel9generic*Not reported
Red Hat/rhbk-openshift-rhel9/rhbk-openshift-rhel9generic*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/keycloak-services, Red Hat/rhbk-keycloak-rhel9/rhbk-keycloak-rhel9, Red Hat/rhbk-openshift-rhel9/rhbk-openshift-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

    Aug 6, 2026

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

  2. Source modified

    Aug 10, 2026

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

  3. First seen by HOL

    Aug 6, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • WPO365 LOGIN before 45.2 SAML Replay Protection BypassAlso CWE-294

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-294
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record