Authentication bypass in Red Hat build of Keycloak 26.2
Priority MEDIUM 41CWE-305Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.
Summary
A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00545 45th percentileScored 2026-11-07
Fix Fixed Red Hat: 4 advisories
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 26.2 | — | 26.2.14-1 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.2 | — | 26.2-16 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.2 | — | 26.2-16 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.2.14 | — | — | Not affected | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4.10-1 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4-12 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4 | — | 26.4-12 | Patch available | CNA |
| Red Hat | Red Hat build of Keycloak 26.4.10 | — | — | Not affected | CNA |
| — | org.keycloak:keycloak-broker-saml (Maven) | up to 1.8.1.Final | — | No fix listed | GHSA-8cr3-vpxx-92cx |
- Red Hat build of Keycloak 26.2 VendorRed Hat Affected — Fixed in 26.2.14-1 Patch available CNA
- Red Hat build of Keycloak 26.2 VendorRed Hat Affected — Fixed in 26.2-16 Patch available CNA
- Red Hat build of Keycloak 26.2 VendorRed Hat Affected — Fixed in 26.2-16 Patch available CNA
- Red Hat build of Keycloak 26.2.14 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4.10-1 Patch available CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-12 Patch available CNA
- Red Hat build of Keycloak 26.4 VendorRed Hat Affected — Fixed in 26.4-12 Patch available CNA
- Red Hat build of Keycloak 26.4.10 VendorRed Hat Affected — Fixed in — Not affected CNA
- org.keycloak:keycloak-broker-saml (Maven) Vendor— Affected up to 1.8.1.Final Fixed in — No fix listed GHSA-8cr3-vpxx-92cx
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:* | not specified by NVD | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:*:*:*:* | 26.2 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:build_of_keycloak:26.2.14:*:*:*:*:*:*:* | 26.2.14 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:*:*:*:* | 26.4 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:build_of_keycloak:26.4.10:*:*:*:*:*:*:* | 26.4.10 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Red Hat |
- cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
- cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:*:*:*:* Versions 26.2 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:build_of_keycloak:26.2.14:*:*:*:*:*:*:* Versions 26.2.14 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:*:*:*:* Versions 26.4 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:build_of_keycloak:26.4.10:*:*:*:*:*:*:* Versions 26.4.10 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
Remediation
Red Hat 4 advisories
- RHSA-2026:3948 Released 2026-03-05 · Red Hat rating ImportantRed Hat build of Keycloak 26.4.10 Images Update
- Red Hat build of Keycloak 26.4 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
- RHSA-2026:3947 Released 2026-03-05 · Red Hat rating ImportantRed Hat build of Keycloak 26.4.10 Update
- Red Hat build of Keycloak 26.4.10
- RHSA-2026:3925 Released 2026-03-05 · Red Hat rating ImportantRed Hat build of Keycloak 26.2.14 Images Update
- Red Hat build of Keycloak 26.2 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
Show 1 more Red Hat advisories
- RHSA-2026:3926 Released 2026-03-05 · Red Hat rating ImportantRed Hat build of Keycloak 26.2.14 Update
- Red Hat build of Keycloak 26.2.14
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat build of Keycloak 26.2 | Fixed | RHSA-2026:3925 |
| Red Hat build of Keycloak 26.2.14 | Fixed | RHSA-2026:3926 |
| Red Hat build of Keycloak 26.4 | Fixed | RHSA-2026:3948 |
| Red Hat build of Keycloak 26.4.10 | Fixed | RHSA-2026:3947 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-3047
- 2026-10-03 Alias added: GHSA-8cr3-vpxx-92cx
- 2026-10-25 EPSS moved to the below the 50th percentile
References
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-2026-08505 Keycloak: keycloak: privilege escalation due to oversized subject_token jwt CVSS 3.1HIGH 8.8
Sources
- CVE-2026-3047 · CVE Program
- CVE-2026-3047 · NVD
- FIRST EPSS
- GHSA-8cr3-vpxx-92cx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-3047 · 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