CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NCVE-2026-1529
High (8.1). EPSS 0.5% chance of exploitation in the next 30 days. Fixed in org.keycloak:keycloak-services 26.2.13, 26.4.9, 26.5.3.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
- CWE
- CWE-347
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hcvw-475w-8g7p | Maven | org.keycloak:keycloak-services | >=26.5.0 <26.5.3 | 26.5.3 |
| GHSA-hcvw-475w-8g7p | Maven | org.keycloak:keycloak-services | <26.2.13 | 26.2.13 |
| GHSA-hcvw-475w-8g7p | Maven | org.keycloak:keycloak-services | >=26.3.0 <26.4.9 | 26.4.9 |