Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw (Red Hat Red Hat build of Keycloak 26.2)

CVE-2026-4282

HIGH 7.4

En bref

Source: NVD
EPSS: EPSS 0.43 % · centile 38 (2026-10-31)
État: PUBLISHED
Publiée: 2026-04-02 12:44 UTC
Mise à jour: 2026-07-15 00:56 UTC
Attribuée par: redhat
Statut NVD: Modified

Rechercher sur…

Description

A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.

Faiblesses (CWE)

CWE-653 — Improper Isolation or Compartmentalization

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	HIGH 7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	redhat
CVSS 3.1	HIGH 7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	redhat-SADP
CVSS 3.1	HIGH 7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	NVD · secalert@redhat.com (Secondary)
CVSS 3.1	HIGH 7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Avis

GHSA-hj93-h7pg-fh6v — Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw

Références européennes

ENISA EUVD · EUVD-2026-18208
GCVE · GCVE-0-2026-4282

Configurations affectées (CPE NVD)

cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.2.15:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:build_of_keycloak:26.4.11:*:*:*:text-only:*:*:*

Produits affectés

Produit	Versions
Red Hat · Red Hat build of Keycloak 26.2	unaffected 26.2.15-1 < *
Red Hat · Red Hat build of Keycloak 26.2	unaffected 26.2-18 < *
Red Hat · Red Hat build of Keycloak 26.2	unaffected 26.2-18 < *
Red Hat · Red Hat build of Keycloak 26.2.15
Red Hat · Red Hat build of Keycloak 26.4	unaffected 26.4.11-1 < *
Red Hat · Red Hat build of Keycloak 26.4	unaffected 26.4-14 < *
Red Hat · Red Hat build of Keycloak 26.4	unaffected 26.4-14 < *
Red Hat · Red Hat build of Keycloak 26.4.11

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

⚠️ Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw (Red Hat Red Hat build of Keycloak 26.2)