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TI-2026-03802 Aliases CVE-2026-4366GHSA-g2qr-3mxm-86jj

Keycloak-services: blind server-side request forgery (ssrf) via http redirect handling in keycloak

Priority LOW 32CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 2 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-918 and the CVSS impact.

Summary

A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended requests to internal or restricted resources. As a result, sensitive internal services such as cloud metadata endpoints could be accessed. This issue may lead to information disclosure and enable attackers to map internal network infrastructure.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00242 15th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 4 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

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat build of Keycloak 26.4—26.4.12-1Patch availableCNA
Red HatRed Hat build of Keycloak 26.4—26.4-17Patch availableCNA
Red HatRed Hat build of Keycloak 26.4—26.4-17Patch availableCNA
Red HatRed Hat build of Keycloak 26.4.12——Not affectedCNA
Red HatRed Hat Build of Keycloak——No fix listedCNA
Red HatRed Hat Build of Keycloak——No fix listedCNA
Red HatRed Hat JBoss Enterprise Application Platform 8——No fix listedCNA
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack——No fix listedCNA
Red HatRed Hat Single Sign-On 7——No fix listedCNA
  • 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
  • Red Hat Build of Keycloak VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Build of Keycloak VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat JBoss Enterprise Application Platform 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat JBoss Enterprise Application Platform Expansion Pack VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Single Sign-On 7 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*not specified by NVDVulnerableRed Hat
cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0:*:*:*:*:*:*:*8.0.0VulnerableRed Hat
cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*not specified by NVDVulnerableRed Hat
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform:8.0.0:*:*:*:*:*:*:* Versions 8.0.0 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2026:19597 Released 2026-05-20 · Red Hat rating Important
    Red 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 Important
    Red 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 →

ProductStatusPlan or fix
Red Hat Build of KeycloakAffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 8AffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion PackAffectedNo fix yet: Fix deferred
Red Hat Single Sign-On 7AffectedNo fix yet: Fix deferred
Red Hat build of Keycloak 26.4Fixed RHSA-2026:19597
Red Hat build of Keycloak 26.4.12Fixed RHSA-2026:19596

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4366
  2. 2026-10-03 Alias added: GHSA-g2qr-3mxm-86jj

References

Advisory 4

  • 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
See all 110 →

Sources

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