Keycloak Admin REST API exposes backend schema and rules

Description

A flaw was found in the Keycloak Admin REST API. This vulnerability allows the exposure of backend schema and rules, potentially leading to targeted attacks or privilege escalation via improper access control.

Basic information

Type
reviewed
Severity
low
Advisory on GitHub
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Repository advisory
Source code
Browse source ↗
Published (advisory)
2026-01-21 15:31:16 UTC
Updated
2026-04-02 15:31:35 UTC
GitHub reviewed
2026-01-21 22:55:20 UTC
NVD published
2026-01-21

EPSS Score

Score Percentile
0.04% 10.95%

CVSS Scores

Base score Version Severity Vector
2.7 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

CWEs

CWE id Name
CWE-284 Improper Access Control

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven org.keycloak:keycloak-services <= 26.2.5

References

cvelogic Threat Intelligence