Vulnerability details

CVE-2026-1529

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

CVSS 3.1

8.1High

Official 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.

CVSS scores

Score	Version	Source	Vector
8.1High	3.1	CVEProject cvelistV5 (CNA) (redhat)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`
8.1High	3.1	CVEProject cvelistV5 (CNA) (redhat-SADP)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

https://access.redhat.com/security/cve/CVE-2026-1529 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2433783 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1529.json x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:2364 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2366 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2363 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2365 vendor-advisoryx_refsource_REDHAT

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Details

Published: 2026-02-09
Last updated: 2026-07-15
State: Published
Assigner (CNA): redhat

Exploit prediction (EPSS)

0.49%

Probability of exploitation in 30 days

42.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-347
Improper Verification of Cryptographic Signature