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Back to active CVEs
High · CVSS 8.0CVE-2026-96453

Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificatesCVE-2026-96453

Answer in brief

CVE-2026-96453 records a High severity (CVSS 8.0) vulnerability in Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificates. The current sources do not mark it as known exploited. The current feed maps Red Hat/keycloak-admin-cli (generic), Red Hat/rhbk/keycloak-rhel9 (generic), Red Hat/rhbk/keycloak-rhel9-operator (generic), Red Hat/rh-sso7-keycloak (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 5, 2026Updated Nov 6, 2026Source checked Nov 8, 2026First seen by HOL Nov 5, 2026Material review Nov 6, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.0
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.0. 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-admin-cli (generic), Red Hat/rhbk/keycloak-rhel9 (generic), Red Hat/rhbk/keycloak-rhel9-operator (generic), Red Hat/rh-sso7-keycloak (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/keycloak-admin-cligeneric*Not reported
Red Hat/rhbk/keycloak-rhel9generic*Not reported
Red Hat/rhbk/keycloak-rhel9-operatorgeneric*Not reported
Red Hat/rh-sso7-keycloakgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/keycloak-admin-cli, Red Hat/rhbk/keycloak-rhel9, Red Hat/rhbk/keycloak-rhel9-operator.
  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. --- CME Mitigation Guidance (2026-11-06) --- Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. The highest-value action is to disable TrustSelfSignedStrategy in the Keycloak Admin CLI HTTP client configuration and enforce validation strictly against the configured custom truststore: upgrade to Red Hat build of Keycloak 26.4.17 / 26.6.8 (or the corresponding fixed Red Hat builds), which disable TrustSelfSignedStrategy in the HTTP client and enforce certificate verification against the provided truststore, closing all 2 injection vectors (Man-in-the-Middle network interception, DNS redirection). Until patched, this is a concern on Administrators executing kcadm with a custom truststore option, so Avoid executing kcadm with custom truststores across untrusted networks, and restrict network paths and DNS resolution between client hosts and Keycloak endpoints. As a compensating measure, Cryptographically verify DNS response authenticity using DNSSEC validation to prevent DNS redirection to unauthorized servers and Isolate administrative traffic between kcadm clients and Keycloak servers into dedicated VLANs or subnets to prevent network interception. These controls limit blast radius and contain exploitation, but they do not fix the underlying certificate validation defect — apply the upstream patch to fully remediate. Highest-impact CME: CME-203 Network Segmentation (VLANs/Subnets) (medium)

Evidence timeline and material changes

  1. Published upstream

    Nov 5, 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 5, 2026

Sources and claim methodology

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

A flaw was found in the Keycloak Admin CLI kcadm tool, which is used by administrators to manage Keycloak servers from the command line. When a custom truststore is provided to verify the server identity, the tool incorrectly accepts any self-signed certificate as long as the hostname matches. This allows a network attacker to impersonate the Keycloak server, steal administrative credentials, and perform unauthorized management actions.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-295
Source
CVE List V5
Source checked
Nov 8, 2026
References
6 linked sources
Open source record