Loading...
Skip to main content
GeekWala

CVE-2026-1529 — Vulnerability in org.keycloak:keycloak-services —...

HIGH

Keycloak affected by improper invitation token validation

Published February 9, 2026Updated February 13, 2026Source: osv

Summary

A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.

Advisory Timeline

  • First published February 9, 2026 (245 days ago).
  • Last revised February 13, 2026 — 4 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.keycloak:keycloak-services to 26.4.9 or later
<!-- Update pom.xml dependency version to 26.4.9 for org.keycloak:keycloak-services -->
Maven
Update org.keycloak:keycloak-services to 26.2.13 or later
<!-- Update pom.xml dependency version to 26.2.13 for org.keycloak:keycloak-services -->
Maven
Update org.keycloak:keycloak-services to 26.5.3 or later
<!-- Update pom.xml dependency version to 26.5.3 for org.keycloak:keycloak-services -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

Affects 1 ecosystem: maven (1).

PackageEcosystemAffectedFixed In
org.keycloak:keycloak-services
maven
26.3.0, 26.3.1, 26.3.2, 26.3.3 (+10 more)26.4.9
org.keycloak:keycloak-services
maven
1.0-alpha-1, 1.0-alpha-1-12062013, 1.0-alpha-2, 1.0-alpha-3 (+198 more)26.2.13
org.keycloak:keycloak-services
maven
26.5.0, 26.5.1, 26.5.226.5.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-347
    Improper Verification of Cryptographic SignatureMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.1 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

Frequently Asked Questions

What is CVE-2026-1529?
Keycloak affected by improper invitation token validation This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.1/10).
How do I check if my project is affected by CVE-2026-1529?
CVE-2026-1529 affects org.keycloak:keycloak-services. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-1529 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.1

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-hcvw-475w-8g7p

Related CVEs

More Maven advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies