CVE-2026-123542
Published:November 08, 2026
Updated:November 09, 2026
OpenAM before 16.1.4 fails to enforce PKCE in the OAuth 2.0 device authorization flow, never validating the code verifier when device codes are exchanged for tokens. Attackers who obtain an approved device code from client logs or shared device storage can redeem it for access and ID tokens to impersonate the user.
Affected Packages
https://github.com/OpenIdentityPlatform/OpenAM.git (GITHUB):
Affected version(s) >=13.0.0-RC1 <16.1.4 || >=14.0.0-M1 <16.1.4 || >=15.0.0 <16.1.4 || >=16.0.0-RC1 <16.1.4Fix Suggestion:
Update to version 16.1.4org.openidentityplatform.openam:openam-oauth2 (JAVA):
Affected version(s) >=15.0.0 <16.1.4 || >=14.5.2 <16.1.4 || >=16.0.1 <16.1.4Fix Suggestion:
Update to version 16.1.4Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improperly Implemented Security Check for Standard
EPSS
Base Score:
0.25