8.1

CVE-2026-3009: redhat build_of_keycloak Incorrect Authorization

CVSS: 8.1v3.1HighModified
AliasesCGA-6xj8-rcmv-r4h9CGA-7m58-qmfg-w6vrCGA-cv64-4f6h-xx69
Published 05-03-2026Last modified 14-09-2026
Open JSON

Vulnerability summary

CVE-2026-3009 is a high (CVSS 8.1) Incorrect Authorization vulnerability in redhat build_of_keycloak. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.7% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.49%
0%100%
Low · +0.15 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-03-2026
    PublishedVulnerability first disclosed.
  2. 14-09-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.15 pp

From 0.33% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.49%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard8 products
  • keycloak-26.3-iamguarded-compatAll versions (No fix recorded)
  • keycloak-26.4All versions (No fix recorded)
  • keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
  • keycloak-fips-26.3-iamguarded-fipsAll versions (No fix recorded)
  • keycloak-fips-26.4All versions (No fix recorded)
Redhat4 products
Wolfi2 products
  • keycloak-26.4All versions (No fix recorded)
  • keycloak-26.4-iamguarded-compatAll versions (No fix recorded)
Org.keycloak1 product
  • keycloak-services< 26.5.5

4 vendors · 15 products

References

10 links