Moderate severity vulnerability that affects org.keycloak:keycloak-core
keycloak before version 4.0.0.final is vulnerable to a infinite loop in session replacement. A Keycloak cluster with multiple nodes could mishandle an expired session replacement and lead to an infinite loop. A malicious authenticated user could use this flaw to achieve Denial of Service on the server.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.keycloak:keycloak-core | < 4.0.0 | 4.0.0 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-835- Platform
- Java / Kotlin (Maven)
- Package
org.keycloak:keycloak-core- Disclosed
- 18.10.2018
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-h7j7-pw3v-3v3x - CC BY 4.0
Vulnerability history: org.keycloak:keycloak-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 49
- First → latest
- 10.2018 02.2025
- Without a fix
- 5
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 14
- Medium 31
- Low 1
Disclosures per year
- 2018: 9
- 2019: 4
- 2020: 4
- 2021: 5
- 2022: 17
- 2023: 4
- 2024: 5
- 2025: 1
- 2026: 0
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Moderate severity vulnerability that affects org.keycloak:keycloak-core this entry
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