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TI-2026-86684 Aliases CVE-2026-123542GHSA-2j6x-v2h7-284v

PKCE bypass in OpenAM device authorization flow

Priority LOW 33CWE-358Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

OpenIdentityPlatform OpenAM before 16.1.4 fails to enforce PKCE in the OAuth 2.0 device authorization flow. The code verifier is never validated when device codes are exchanged for tokens (CWE-358). An attacker who obtains an approved device code from client logs or shared device storage can redeem it for access and ID tokens and impersonate the user. The CVSS 4.0 vector rates the attack as network-reachable, requiring user interaction and no privileges.

Written with Claude Haiku 5.5 from the sources below · 2026-11-08

Description from the CNA

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.

Why it matters now

EPSS 0.0025 16th percentileScored 2026-11-08
Fix Fixed OpenAM (OpenIdentityPlatform): 16.1.4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenIdentityPlatformOpenAMbefore 16.1.416.1.4Patch availableCNA

Remediation

Upgrade OpenIdentityPlatform OpenAM to version 16.1.4.

Written with Claude Haiku 5.5 from the sources below · 2026-11-08

  • Fix · CNA OpenAM (OpenIdentityPlatform) Fixed in 16.1.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OpenIdentityPlatform OpenAM 16.1.4

    18 records Highest priority Priority MEDIUM 3 MEDIUM, 15 LOW

    Other records, highest priority first

    • TI-2026-86693 Session token disclosure in OpenAM notification WebSocketPriority MEDIUM 43
    • TI-2026-86692 Authentication bypass in OpenAM SAML login accepts unsigned assertionsPriority MEDIUM 41
    • TI-2026-86691 Privilege escalation in OpenAM via self-registration attribute bypassPriority MEDIUM 40
    Show all 18 records →

Timeline

  1. 2026-11-08 Threatist record created from CVE-2026-123542
  2. 2026-11-08 Alias added: GHSA-2j6x-v2h7-284v
  3. 2026-11-09 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2025-20332 OpenDJ Denial of Service (Dos) using alias loop CVSS 4.0HIGH 8.7
  • TI-2026-25836 Pre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAM CVSS 4.0CRITICAL 9.3
  • TI-2026-44519 OpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallback CVSS 3.1CRITICAL 9.8
  • TI-2023-19079 User impersonation using SAMLv1.x SSO in Open Access Management CVSS 3.1CRITICAL 9.8
  • TI-2026-34275 OpenAM Authentication Bypass via MSISDN LDAP Injection CVSS 4.0CRITICAL 9.3
  • TI-2026-32901 OpenAM Pre-auth User Profile Tampering via Anonymous SOAP Authn in Liberty IDPP/Discovery Endpoints CVSS 4.0CRITICAL 9.3
See all 54 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences