# CVE-2026-17059 — Red Hat Build of Keycloak

> As of 2026-07-24, CVE-2026-17059 is a MEDIUM-severity vulnerability in Red Hat Build of Keycloak, CVSS v3.1 6.5, EPSS 0.2% (11.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-17059, most recently “CVE-2026-17059: Keycloak Admin REST API Broken Object-Level Authorization Exposes User PII”.

**Last updated:** 2026-07-24

## What is CVE-2026-17059?

A flaw was found in the role-users endpoint of the keycloak-services library, which is the core component of the Keycloak identity and access management solution. The issue occurs because the system fails to check if an administrator has permission to view individual users when listing members of a role. This allows a restricted administrator to see private information, such as names and email addresses, for users they should not be able to access.

The record classifies CVE-2026-17059 under weakness class [CWE-639](https://intel.threadlinqs.com/cwe/CWE-639). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 73 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 11.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-24

## Is CVE-2026-17059 being exploited?

No public exploitation evidence for CVE-2026-17059 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-07-24. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- [Red Hat](https://intel.threadlinqs.com/vendors/red-hat): Build of Keycloak, Data Grid 8, JBoss Enterprise Application Platform Expansion Pack, Single Sign-On 7

## How to fix CVE-2026-17059

No vendor patch reference has been recorded for CVE-2026-17059 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-17059

1 tracked threat in the Threadlinqs corpus references CVE-2026-17059, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CVE-2026-17059: Keycloak Admin REST API Broken Object-Level Authorization Exposes User PII](https://intel.threadlinqs.com/threat/TL-2026-1796) — MEDIUM · 2026-07-31

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-01.

**Third-party advisory**

- [access.redhat.com — vdb entry](https://access.redhat.com/security/cve/CVE-2026-17059)
- [bugzilla.redhat.com — issue tracking](https://bugzilla.redhat.com/show_bug.cgi?id=2506746)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-17059
Full detection coverage and IOCs for threats exploiting CVE-2026-17059 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp