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TI-2026-02223 Aliases CVE-2026-2603GHSA-x4p7-7chp-64hq

Keycloak: keycloak: unauthorized authentication via disabled saml identity provider

Priority HIGH 70CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
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-306.

Summary

A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity Provider is disabled, leading to unauthorized authentication.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00451 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed org.keycloak:keycloak-services (Maven): 26.5.5org.keycloak:keycloak-server-spi-private (Maven): 26.5.5Red Hat: 4 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat build of Keycloak 26.2—26.2.14-1Patch availableCNA
Red HatRed Hat build of Keycloak 26.2—26.2-16Patch availableCNA
Red HatRed Hat build of Keycloak 26.2—26.2-16Patch availableCNA
Red HatRed Hat build of Keycloak 26.2.14——Not affectedCNA
Red HatRed Hat build of Keycloak 26.4—26.4.10-1Patch availableCNA
Red HatRed Hat build of Keycloak 26.4—26.4-12Patch availableCNA
Red HatRed Hat build of Keycloak 26.4—26.4-12Patch availableCNA
Red HatRed Hat build of Keycloak 26.4.10——Not affectedCNA
—org.keycloak:keycloak-services (Maven)before 26.5.526.5.5Patch availableGHSA-x4p7-7chp-64hq
—org.keycloak:keycloak-server-spi-private (Maven)before 26.5.526.5.5Patch availableGHSA-x4p7-7chp-64hq
  • 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-services (Maven) Vendor— Affected before 26.5.5 Fixed in 26.5.5 Patch available GHSA-x4p7-7chp-64hq
  • org.keycloak:keycloak-server-spi-private (Maven) Vendor— Affected before 26.5.5 Fixed in 26.5.5 Patch available GHSA-x4p7-7chp-64hq

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*26.2 to before 26.2.14; 26.4 to before 26.4.10VulnerableRed Hat
  • cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:* Versions 26.2 to before 26.2.14; 26.4 to before 26.4.10 Vulnerable ·Red Hat

Remediation

  • Fix · GHSA-x4p7-7chp-64hq org.keycloak:keycloak-services (Maven) Fixed in 26.5.5 Advisory →
  • Fix · GHSA-x4p7-7chp-64hq org.keycloak:keycloak-server-spi-private (Maven) Fixed in 26.5.5 Advisory →

Red Hat 4 advisories

  • RHSA-2026:3948 Released 2026-03-05 · Red Hat rating Important
    Red 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 Important
    Red 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 Important
    Red 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 Important
    Red 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 →

ProductStatusPlan or fix
Red Hat build of Keycloak 26.2Fixed RHSA-2026:3925
Red Hat build of Keycloak 26.2.14Fixed RHSA-2026:3926
Red Hat build of Keycloak 26.4Fixed RHSA-2026:3948
Red Hat build of Keycloak 26.4.10Fixed RHSA-2026:3947

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2603
  2. 2026-10-03 Alias added: GHSA-x4p7-7chp-64hq
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

Advisory 7

Other 6

  • 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
  • TI-2026-08505 Keycloak: keycloak: privilege escalation due to oversized subject_token jwt CVSS 3.1HIGH 8.8
See all 110 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences