Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-639.
Summary
A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4.12-1 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4-17 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4-17 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4.12 | — | — | Not affected | CNA |
| — | org.keycloak:keycloak-services (Maven) | before 26.6.2 | 26.6.2 | Patch available | GHSA-c739-f6xw-6pv2 |
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4.12-1 Patch available CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-17 Patch available CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-17 Patch available CNA
- Red Hat build of Keycloak 26.4.12 VendorRed Hat Affected — Fixed in — Not affected CNA
- org.keycloak:keycloak-services (Maven) Vendor— Affected before 26.6.2 Fixed in 26.6.2 Patch available GHSA-c739-f6xw-6pv2
Remediation
- Fix · GHSA-c739-f6xw-6pv2 org.keycloak:keycloak-services (Maven) Fixed in 26.6.2 Advisory →
Red Hat 2 advisories
- RHSA-2026:19597 Released 2026-05-20 · Red Hat rating ImportantRed Hat build of Keycloak 26.4.12 Images Security Update
- Red Hat build of Keycloak 26.4 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
- RHSA-2026:19596 Released 2026-05-20 · Red Hat rating ImportantRed Hat build of Keycloak 26.4.12 Security Update
- Red Hat build of Keycloak 26.4.12
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat build of Keycloak 26.4 | Fixed | RHSA-2026:19597 |
| Red Hat build of Keycloak 26.4.12 | Fixed | RHSA-2026:19596 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-4630
- 2026-10-03 Alias added: GHSA-c739-f6xw-6pv2
References
Advisory 5
Other 6
- https://github.com/keycloak/keycloak/issues/49115
- https://github.com/keycloak/keycloak/pull/49121
- https://github.com/keycloak/keycloak/commit/0cea089bd19f5061f5fd47099fd6fb41a17d8c55
- https://github.com/keycloak/keycloak/commit/1192267af8f16a7b722bdc2abbd3410c477388aa
- https://github.com/keycloak/keycloak/commit/4e9b17cbedb828b4afc6b62399eee317d4735234
- https://github.com/keycloak/keycloak
More Red Hat Build Of Keycloak vulnerabilities
- TI-2026-02223 Keycloak: keycloak: unauthorized authentication via disabled saml identity provider CVSS 3.1HIGH 8.1
- TI-2024-01049 Keycloak: path transversal in redirection validation CVSS 3.1HIGH 8.1
- TI-2026-13740 Keycloak-services: keycloak-services: saml idp-initiated broker login bypasses link-only restriction CVSS 3.1CRITICAL 9.8
- TI-2026-13741 Keycloak-services: keycloak-services: saml broker metadata import disables response signature validation CVSS 3.1CRITICAL 9.1
- TI-2026-13106 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation CVSS 3.1HIGH 8.8
- TI-2026-02631 Authentication bypass in Red Hat build of Keycloak 26.2 CVSS 3.1HIGH 8.8
Sources
- CVE-2026-4630 · CVE Program
- CVE-2026-4630 · NVD
- FIRST EPSS
- GHSA-c739-f6xw-6pv2 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-4630 · 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