Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-4pgc-gfrr-wcmg
Advisory ID github_osv/GHSA-4pgc-gfrr-wcmg
Aliases CVE-2026-4628
Summary Keycloak has Improper Access Control that allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity.
Status Published
Exploitability 0.5
Weighted Severity 3.9
Risk 1.9
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-284 Improper Access Control
System Score Found at
cvssv3.1 4.3 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-4pgc-gfrr-wcmg/GHSA-4pgc-gfrr-wcmg.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/keycloak/keycloak
CVE-2026-4628 Advisory https://access.redhat.com/security/cve/CVE-2026-4628
CVE-2026-4628 https://nvd.nist.gov/vuln/detail/CVE-2026-4628
RHSA-2026:19596 Advisory https://access.redhat.com/errata/RHSA-2026:19596
show_bug.cgi?id=2450240 Bug https://bugzilla.redhat.com/show_bug.cgi?id=2450240
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-4pgc-gfrr-wcmg/GHSA-4pgc-gfrr-wcmg.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.