Medium severity · published Jul 17, 2026
CVE-2026-16089
Keycloak-services: keycloak-services: authorization codes can be retargeted to another client session
5.9
CVSS
0.3%
EPSS
No
On KEV
Description
A flaw was found in the keycloak-services component of Red Hat Build of Keycloak. The issue occurs because OAuth 2.0 authorization codes are not properly bound to the client that originally requested them. An attacker who can intercept an authorization code can modify it to be redeemed by their own client, potentially allowing them to obtain access tokens for a victim's identity.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat build of Keycloak 26.6 · Red Hat
All versions, or not specified · source: vendor
BO
Build OF Keycloak · Redhat
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16089
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16089
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:68277
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:68278
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-16089
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2501724
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