VulnerabilityModified
CVE-2026-4282
This vulnerability allows an unauthenticated attacker to forge authorization codes.
HIGH 7.4EPSS 0.43%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.43% probability · 36th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-653
- Affected
- redhat/build of keycloak
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:6475Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6476Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6477Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6478Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-4282Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2448061Issue Tracking, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6475Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6476Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6477Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6478Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-4282Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2448061Issue Tracking, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4282.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.