Vulnerability in Red Hat Build Of Keycloak 26.4
CVE-2026-1486
A flaw was found in Keycloak. A vulnerability exists in the jwt-authorization-grant flow where the server fails to verify if an Identity Provider (IdP) is enabled before issuing tokens. The issuer lookup mechanism (lookupIdentityProviderFromIssuer) retrieves the IdP configuration but does not filter for isEnabled=false. If an administrator disables an IdP (e.g., due to a compromise or offboarding), an entity possessing that IdP's signing key can still generate valid JWT assertions that Keycloak accepts, resulting in the issuance of valid access tokens.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Red Hat Build Of Keycloak 26.4 — versions 26.4.9-1, 26.4-11, 26.4-10
- Red Hat Build Of Keycloak 26.4.9
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:2365 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:2366 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2026-1486 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-1486?
- CVE-2026-1486 is a high-severity vulnerability in Red Hat Build Of Keycloak 26.4, classified under CWE-358. CVSS score: 8.8/10. Published 2026-02-09.
- How severe is CVE-2026-1486?
- High severity. CVSS v3 base score is 8.8 out of 10.