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Keycloak allows Binding to an Unrestricted IP Address

Moderate severity GitHub Reviewed Published Nov 13, 2025 to the GitHub Advisory Database • Updated Nov 14, 2025

Package

maven org.keycloak:keycloak-quarkus-server (Maven)

Affected versions

<= 26.4.4

Patched versions

None

Description

A vulnerability exists in Keycloak's server distribution where enabling debug mode (--debug ) insecurely defaults to binding the Java Debug Wire Protocol (JDWP) port to all network interfaces (0.0.0.0). This exposes the debug port to the local network, allowing an attacker on the same network segment to attach a remote debugger and achieve remote code execution within the Keycloak Java virtual machine.

References

Published by the National Vulnerability Database Nov 13, 2025
Published to the GitHub Advisory Database Nov 13, 2025
Reviewed Nov 13, 2025
Last updated Nov 14, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Adjacent
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(4th percentile)

Weaknesses

Binding to an Unrestricted IP Address

The product assigns the address 0.0.0.0 for a database server, a cloud service/instance, or any computing resource that communicates remotely. Learn more on MITRE.

CVE ID

CVE-2025-11538

GHSA ID

GHSA-7m9g-pmxf-m9m8

Source code

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