Riskcovery

CVE-2026-1529

Org.keycloak.services.resources.organizations: keycloak: unauthorized organization registration via improper invitation token validation

State
Published
Severity
8.1 High
Published
Feb 9, 2026
Updated
Jul 15, 2026
Reserved
Jan 28, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.18.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nredhat
3.18.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nredhat-SADP

Weaknesses

  • CWE-347 Improper Verification of Cryptographic Signature

Affected Products

ProductVersions
Red Hat build of Keycloak 26.2Red Hat
  • 26.2.13-1 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat
  • 26.2-15 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat
  • 26.2-15 and laterNot affected
Red Hat build of Keycloak 26.2.13Red Hat
    Red Hat build of Keycloak 26.4Red Hat
    • 26.4.9-1 and laterNot affected
    Red Hat build of Keycloak 26.4Red Hat
    • 26.4-11 and laterNot affected
    Red Hat build of Keycloak 26.4Red Hat
    • 26.4-10 and laterNot affected
    Red Hat build of Keycloak 26.4.9Red Hat

      References

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