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CVE

CVE-2026-4282

Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw
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CVE

CVE-2026-4282

Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.4
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
7.4
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-4282, https://github.com/keycloak/keycloak/issues/47719, https://github.com/keycloak/keycloak/commit/9046f201125a6fd6be9c116b99d348509d99d4a5, https://access.redhat.com/errata/RHSA-2026:6475, https://access.redhat.com/errata/RHSA-2026:6476, https://access.redhat.com/errata/RHSA-2026:6477, https://access.redhat.com/errata/RHSA-2026:6478, https://access.redhat.com/security/cve/CVE-2026-4282, https://bugzilla.redhat.com/show_bug.cgi?id=2448061, https://github.com/keycloak/keycloak

Severity

7.4

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.4
EPSS Probability
0.00021%
EPSS Percentile
0.05932%
Introduced Version
22.0.0,20.0.0,15.0.0,4.8.0.Final,3.3.0.CR1,3.2.0.CR1,0
Fix Available
26.5.7,21.0.0,26.5.7-r0,26.5.6-r4

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