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PatchSiren cyber security CVE debrief

CVE-2026-11577 Red Hat CVE debrief

A flaw was found in Keycloak, which allows a limited administrator to exploit an improper access control vulnerability in the POST /admin/realms/{realm}/partialImport endpoint. This enables them to bypass Fine-Grained Admin Permissions (FGAP) and escalate their privileges to a full realm administrator by importing users with realm-admin role mappings.

Vendor
Red Hat
Product
Red Hat Build of Keycloak
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-03
Advisory published
2026-06-08
Advisory updated
2026-07-03

Who should care

Administrators and users of Keycloak, especially those with limited administrator privileges, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability has a CVSS score of 7.2 and is classified as HIGH severity. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. The weakness associated with this vulnerability is CWE-863.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Restrict access to the POST /admin/realms/{realm}/partialImport endpoint to only trusted administrators.
  • Monitor and audit administrator activities to detect potential exploitation attempts.

Evidence notes

The vendor is Redhat, and the product is Keycloak. The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information can be found at [ref-4], [ref-5], and [ref-6].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11577 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11577

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11577 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11577

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.