Keycloak: amount of attributes per object is not limited and it may lead to dos
Priority MEDIUM 40CWE-231Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited,an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00736 54th percentileScored 2026-11-07
Fix Partial keycloak: 24.0.0org.keycloak:keycloak-core (Maven): 24.0.0Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | keycloak | before 24.0.0 | 24.0.0 | Patch available | CNA |
| Red Hat | Red Hat build of Quarkus | — | — | Not affected | CNA |
| Red Hat | Red Hat Fuse 7 | — | — | Not affected | CNA |
| Red Hat | Red Hat Mobile Application Platform 4 | — | — | Not affected | CNA |
| Red Hat | Red Hat OpenShift Application Runtimes | — | — | Not affected | CNA |
| Red Hat | Red Hat Process Automation 7 | — | — | Not affected | CNA |
| Red Hat | Red Hat Single Sign-On 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat support for Spring Boot | — | — | Not affected | CNA |
| — | org.keycloak:keycloak-core (Maven) | before 24.0.0 | 24.0.0 | Patch available | GHSA-w97f-w3hq-36g2 |
- keycloak Vendor— Affected before 24.0.0 Fixed in 24.0.0 Patch available CNA
- Red Hat build of Quarkus VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Fuse 7 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Mobile Application Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat OpenShift Application Runtimes VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Process Automation 7 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Single Sign-On 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat support for Spring Boot VendorRed Hat Affected — Fixed in — Not affected CNA
- org.keycloak:keycloak-core (Maven) Vendor— Affected before 24.0.0 Fixed in 24.0.0 Patch available GHSA-w97f-w3hq-36g2
Remediation
- Fix · CNA keycloak Fixed in 24.0.0
- Fix · GHSA-w97f-w3hq-36g2 org.keycloak:keycloak-core (Maven) Fixed in 24.0.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Single Sign-On 7 | Affected | No fix yet: Fix deferred |
Not affected: 6 products
- Red Hat Fuse 7
- Red Hat Mobile Application Platform 4
- Red Hat OpenShift Application Runtimes
- Red Hat Process Automation 7
- Red Hat build of Quarkus
- Red Hat support for Spring Boot
Timeline
- 2026-10-02 Threatist record created from CVE-2023-6841
- 2026-10-03 Alias added: GHSA-w97f-w3hq-36g2
References
More Red Hat Keycloak vulnerabilities
- TI-2024-01049 Keycloak: path transversal in redirection validation CVSS 3.1HIGH 8.1
- TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
- TI-2020-08665 Server-side request forgery in keycloak CVSS 3.1MEDIUM 5.3
- TI-2022-03468 Path traversal in Red Hat Keycloak CVSS 3.1CRITICAL 9.1
- TI-2021-03612 A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak. CVSS 3.1MEDIUM 6.1
- TI-2022-03994 Cross-site scripting in keycloak CVSS 3.1CRITICAL 10.0
Sources
- CVE-2023-6841 · CVE Program
- CVE-2023-6841 · NVD
- FIRST EPSS
- GHSA-w97f-w3hq-36g2 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-6841 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences