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Fencer Vulns
high 8.8

CVE-2026-1486 json

Org.keycloak.protocol.oidc.grants: disabled identity providers are still accepted for jwt authorization grant

published 2026-02-09 8 mo ago modified 2026-07-15 3 mo ago also GHSA-37gf-gmxv-74wv , EUVD-2026-6445

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.keycloak:keycloak-services 26.4.9, 26.5.3
  • Red Hat Red Hat build of Keycloak 26.4 26.4-10, 26.4-11, 26.4.9-1

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-2026-1486 updated cvss 8.8

org.keycloak.protocol.oidc.grants: Disabled identity providers are still accepted for JWT Authorization Grant

  • Red Hat build of Keycloak 26.4 rhbk/keycloak-rhel9 26.4-11, rhbk/keycloak-rhel9-operator 26.4-10, rhbk/keycloak-operator-bundle 26.4.9-1
    fixed: vendor fix RHSA-2026:2366
  • Red Hat build of Keycloak 26.4.9
    fixed: vendor fix RHSA-2026:2365

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

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.keycloak:keycloak-services
>=26.5.0, <26.5.3
<26.4.9
26.5.3
26.4.9

Affected products

  • Red Hat Red Hat build of Keycloak 26.4
  • Red Hat Red Hat build of Keycloak 26.4.9

Classification

Weakness
  • CWE-358 Improperly Implemented Security Check for Standard

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.