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Advisory details: vulnrichment / CVE-2026-3009
Advisory ID vulnrichment/CVE-2026-3009
Aliases
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.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-863 Incorrect Authorization
System Score Found at
cvssv3.1 8.1
ssvc Track
Reference id Reference type URL
cpe:/a:redhat:build_keycloak:26.4::el9 Other https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:/a:redhat:build_keycloak:26.4::el9
cpe:/a:redhat:jbosseapxp Other https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:jboss_enterprise_application_platform:8 Other https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:red_hat_single_sign_on:7 Other https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:/a:redhat:red_hat_single_sign_on:7
CVE-2026-3009 Advisory https://access.redhat.com/security/cve/CVE-2026-3009
RHSA-2026:3947 https://access.redhat.com/errata/RHSA-2026:3947
RHSA-2026:3948 https://access.redhat.com/errata/RHSA-2026:3948
show_bug.cgi?id=2441867 Bug https://bugzilla.redhat.com/show_bug.cgi?id=2441867
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at None
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-06T18:14:28Z/ Found at None

Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-06T18:14:28Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/3xxx/CVE-2026-3009.json

Source Advisory: vulnrichment/CVE-2026-3009

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'total'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]