A flaw was found in Keycloak. Certain endpoints in Keycloak's admin REST API allow low-privilege users to access administrative functionalities. This flaw allows users to perform actions reserved for administrators, potentially leading to data breaches or system compromise.
CVE-2024-3656
Score elevated to 9.0 because EPSS predicts 90% probability of exploitation within the next 30 days (top 0.4% of all CVEs). NVD baseline CVSS 8.1 retained for reference. Confidence: see factors.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 8.1
- EG Score
- 9.0(high)
- EPSS
- 85.3%
- KEV
- Not listed
Published
October 9, 2024
Last Modified
April 15, 2026
References (8)
- secalert@redhathttps://access.redhat.com/errata/RHSA-2024:3572
- secalert@redhathttps://access.redhat.com/errata/RHSA-2024:3575
- secalert@redhathttps://access.redhat.com/security/cve/CVE-2024-3656
- secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2274403
- secalert@redhathttps://github.com/advisories/GHSA-2cww-fgmg-4jqc
- af854a3a-2127-422b-91ae-364da2661108https://github.com/hnsecurity/vulns/blob/main/HNS-2024-08-Keycloak.md
- af854a3a-2127-422b-91ae-364da2661108https://news.ycombinator.com/item?id=42136000
- af854a3a-2127-422b-91ae-364da2661108https://security.humanativaspa.it/an-analysis-of-the-keycloak-authentication-system/
Patch Availability(2)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | patch | 2024-06-03 | redhat |
| redhat | patch | 2024-06-03 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
Maven(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| org.keycloak:keycloak-services | 1.0-alpha-1 ... 9.0.3 (173 versions) | 24.0.5 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(2)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 11× in last 7d / 42× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:07 UTCEPSS rescore
- 2026-07-21 15:23 UTCEPSS rescore
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- 2026-07-06 02:22 UTCEPSS rescore
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- 2026-06-28 14:07 UTCEPSS rescore
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- 2026-06-27 03:07 UTCEPSS rescore
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- 2026-06-01 13:51 UTCEPSS rescore
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- 2026-05-28 13:44 UTCEPSS rescore
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- 2026-05-27 13:40 UTCEPSS rescore
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- 2026-05-27 13:40 UTCEPSS rescore
- 2026-05-21 23:02 UTCEG score recompute
- 2026-05-21 23:02 UTCVendor advisory
- 2026-05-18 21:30 UTCEPSS rescore
- 2026-05-18 21:30 UTCEPSS rescore
- 2026-05-18 21:30 UTCEPSS rescore
- 2026-05-18 21:30 UTCEPSS rescore
Publicly available exploits
(2 references)Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCh4x0r-dz/CVE-2024-3656First seen Oct 12, 2024
Keycloak admin API allows low privilege users to use administrative functions
Open source ↗ - Nucleihttp/cves/2024/CVE-2024-3656.yamlFirst seen Jan 1, 2024
Keycloak < 24.0.5 - Broken Access Control
Open source ↗
Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat
Frequently asked(5)
What is CVE-2024-3656?
When was CVE-2024-3656 disclosed?
Is CVE-2024-3656 actively exploited?
What is the CVSS score of CVE-2024-3656?
How do I remediate CVE-2024-3656?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-3656
Is Your Infrastructure Affected by CVE-2024-3656?
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