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Fencer Vulns
high 8.1

CVE-2026-3009 json

Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)

published 2026-03-05 8 mo ago modified 2026-09-14 56 d ago also BIT-keycloak-2026-3009 , EUVD-2026-9863 , GHSA-m297-3jv9-m927

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.

Patch / fix

  • maven org.keycloak:keycloak-services 26.5.5
  • bitnami keycloak 26.4.1, 26.5.0
  • Red Hat Red Hat build of Keycloak 26.4 26.4-12, 26.4.10-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-3009 updated cvss 8.1

org.keycloak/keycloak-services: Improper Enforcement of Disabled Identity Provider in IdentityBrokerService (Authentication Bypass)

  • Red Hat Single Sign-On 7 keycloak-services
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat build of Keycloak 26.4 rhbk/keycloak-rhel9 26.4-12, rhbk/keycloak-rhel9-operator 26.4-12, rhbk/keycloak-operator-bundle 26.4.10-1
    fixed: vendor fix RHSA-2026:3948
  • Red Hat build of Keycloak 26.4.10
    fixed: vendor fix RHSA-2026:3947
  • Red Hat JBoss Enterprise Application Platform 8 keycloak-services Red Hat JBoss Enterprise Application Platform Expansion Pack keycloak-services
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
8 mo ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
GitHub 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
OSV 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-services
<26.5.5
26.5.5
bitnami keycloak
>=26.4.0, <26.4.1
>=26.4.10, <26.5.0
26.4.1
26.5.0

Affected products

  • Red Hat Red Hat build of Keycloak 26.4
  • Red Hat Red Hat build of Keycloak 26.4.10
  • Red Hat Red Hat JBoss Enterprise Application Platform 8
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat Red Hat Single Sign-On 7

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.