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Fencer Intel
medium 5.4

CVE-2026-117627 json

Keycloak-services: keycloak-services: jwt authorization grant bypasses identity provider login restrictions

published 11d ago modified 6d ago also EUVD-2026-112636

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

A flaw was found in the JWT Authorization Grant implementation of the keycloak-services component. When an OIDC or Google identity provider is configured with specific login restrictions, such as claim filtering, these checks are correctly applied during standard browser logins but are skipped during the JWT-based grant flow. This allows an authenticated client to obtain access tokens for a user even if their identity provider claims should have blocked the login.

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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-2026-117627 updated cvss 5.4

keycloak-services: keycloak-services: JWT Authorization Grant bypasses Identity Provider login restrictions

  • Red Hat Build of Keycloak rhbk/keycloak-rhel9, keycloak-services 26.6.7.redhat-00003
    affected: workaround, no fix available
  • Red Hat Single Sign-On 7 keycloak-services 26.6.7.redhat-00003
    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
partial
Assessed
6d ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

  • Red Hat Red Hat Build of Keycloak
  • Red Hat Red Hat Single Sign-On 7

Classification

Weakness

References

Sources

Fencer Intel 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.