CVE Tools
Sign in

CVE-2026-37978

Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api

Published: May 19, 2026Updated: Jun 3, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
4.9CVSSMEDIUM
EPSS Score
0.4%
Top 68.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-639

Affected Products

build of keycloakredhat
On-prem
Security Products / identity-access-mgmt
Red Hat build of Keycloak 26.4Red Hat
On-premWeb App
Web & CMS Plugins
Red Hat build of Keycloak 26.4.12Red Hat
On-prem
Operating Systems / linux-distro
redhatcommercialUSOperating Systemsaka red hat
red hatcommercialUSOperating Systemsaka red hat

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:19596
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:19597
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-37978
access.redhat.com
and 1 more references View all →

Timeline

Published
May 19, 2026
Last Updated
Jun 3, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-37978 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows