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TI-2026-86685 Aliases CVE-2026-123543GHSA-mj2w-95gj-v3w5

Unbounded Java deserialization in OpenAM enables denial of service

Priority MEDIUM 53CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

OpenIdentityPlatform OpenAM before 16.1.4 accepts serialized Java data without size or structure limits (CWE-770). An unauthenticated remote attacker sends small crafted requests to SDK endpoints, classic login pages, or the administration console to exhaust server resources. The resulting resource exhaustion blocks authentication, session validation and policy decisions.

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

Description from the CNA

OpenAM before 16.1.4 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server resources by sending serialized Java data without size or structure limits. Attackers can send small crafted requests to remote SDK endpoints, classic login pages, or the administration console to block authentication, session validation and policy decisions.

Why it matters now

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
OpenIdentityPlatformOpenAMbefore 16.1.416.1.4Patch availableCNA
OpenIdentityPlatformOpenAMbefore 16.1.416.1.4Patch availableCNA
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
  • Fix · CNA OpenAM (OpenIdentityPlatform) Fixed in 16.1.4
  • Fix · CNA OpenAM (OpenIdentityPlatform) Fixed in 16.1.4
  • 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 10 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2026-86693 Session token disclosure in OpenAM notification WebSocketPriority MEDIUM 58
    • TI-2026-86692 Authentication bypass in OpenAM SAML login accepts unsigned assertionsPriority MEDIUM 55
    • TI-2026-86691 Privilege escalation in OpenAM via self-registration attribute bypassPriority MEDIUM 55
    Show all 18 records →

Timeline

  1. 2026-11-08 Threatist record created from CVE-2026-123543
  2. 2026-11-08 Alias added: GHSA-mj2w-95gj-v3w5

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-2026-86693 Session token disclosure in OpenAM notification WebSocket CVSS 4.0CRITICAL 10.0
  • TI-2026-86692 Authentication bypass in OpenAM SAML login accepts unsigned assertions CVSS 4.0CRITICAL 9.3
  • TI-2026-86691 Privilege escalation in OpenAM via self-registration attribute bypass CVSS 4.0CRITICAL 9.3
  • TI-2026-44519 OpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallback CVSS 3.1CRITICAL 9.8
See all 54 →

Sources

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