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CVE-2026-4630— Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference

CVSS 6.8 · Medium EPSS 0.03% · P8

Affected Version Matrix 1

VendorProductVersion RangeStatus
Red HatRed Hat Build of Keycloakanyaffected
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I. Basic Information for CVE-2026-4630

Vulnerability Information
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Vulnerability Title
Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:

II. Public POCs for CVE-2026-4630

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III. Intelligence Information for CVE-2026-4630

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Same Patch Batch · Red Hat · 2026-05-19 · 11 CVEs total

CVE-2026-75048.1 HIGHOrg.keycloak/keycloak-services: open redirect when using wildcard valid redirect uris in k
CVE-2026-75077.5 HIGHOrg.keycloak/keycloak-services: session fixation in oidc login flow that can lead to accou
CVE-2026-73077.5 HIGHKeycloak: keycloak: denial of service via specially crafted saml input
CVE-2026-75717.1 HIGHKeycloak: keycloak: access token disclosure and implicit flow bypass via forged client dat
CVE-2026-379826.8 MEDIUMKeycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauth
CVE-2026-379796.5 MEDIUMKeycloak: keycloak: information disclosure via oidc token introspection endpoint audience
CVE-2026-89225.4 MEDIUMOrg.keycloak/keycloak-services: keycloak: org.keycloak.protocol.oidc: security flaw in org
CVE-2026-379784.9 MEDIUMKeycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admi
CVE-2026-379814.3 MEDIUMKeycloak: org.keycloak.authorization: keycloak: information disclosure via broken access c
CVE-2026-88304.3 MEDIUMKeycloak: org.keycloak/keycloak-services: keycloak: policy bypass during webauthn credenti

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-639

V. Comments for CVE-2026-4630

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