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PatchSiren cyber security CVE debrief

CVE-2026-9088 Red Hat CVE debrief

A flaw was found in org.keycloak.services. An administrator with delegated access to read group memberships and users can bypass user profile permissions by accessing the group members endpoint. This allows the administrator to view user attributes that are explicitly configured to be denied, leading to information disclosure.

Vendor
Red Hat
Product
Red Hat build of Keycloak 26.6
CVSS
LOW 2.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Administrators and users of Keycloak services should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability has a CVSS score of 2.7 and is classified as LOW severity. It can be exploited by an administrator with high privileges, and it allows unauthorized access to sensitive user information.

Defensive priority

Low

Recommended defensive actions

  • Apply patches or updates provided by the vendor to fix the vulnerability.
  • Restrict access to the group members endpoint to prevent unauthorized access.
  • Monitor user profile permissions and ensure that sensitive attributes are properly configured.

Evidence notes

The vulnerability was reported by Redhat and has been documented in their security advisories.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9088 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9088

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

  • CVE-2026-9088 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9088

    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.