Open redirect in OpenAM via SAML 1.x trusted-partner matching
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-601.
Summary
OpenAM before 16.1.4 contains an open redirect flaw in its SAML 1.x single sign-on handling, where trusted-partner destination matching is too loose (CWE-601). A remote attacker can craft links to /SAMLAwareServlet or /SAMLPOSTProfileServlet with a destination host that resembles a trusted partner, sending authenticated users to attacker-controlled phishing sites. The attacker needs user interaction, such as a victim following the crafted link, and can affect integrity with no confidentiality or availability impact.
Written with Claude Haiku 5.5 from the sources below · 2026-11-08
Description from the CNA
OpenAM before 16.1.4 contains an open redirect vulnerability that allows remote attackers to redirect users after SAML 1.x single sign-on by exploiting loose trusted-partner destination matching. Attackers can craft links to /SAMLAwareServlet or /SAMLPOSTProfileServlet with a destination host resembling a trusted partner to send authenticated users to attacker-controlled phishing sites.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenIdentityPlatform | OpenAM | before 16.1.4 | 16.1.4 | Patch available | CNA |
- OpenAM VendorOpenIdentityPlatform Affected before 16.1.4 Fixed in 16.1.4 Patch available CNA
Remediation
OpenIdentityPlatform OpenAM is fixed in version 16.1.4. Upgrade OpenAM to 16.1.4 or later.
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
Timeline
- 2026-11-08 Threatist record created from CVE-2026-123541
- 2026-11-08 Alias added: GHSA-j8x6-3fvh-h537
References
More OpenIdentityPlatform vulnerabilities
- 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
Sources
- CVE-2026-123541 · CVE Program
- CVE-2026-123541 · NVD
- FIRST EPSS
- GHSA-j8x6-3fvh-h537 · GitHub Advisory Database · CC BY 4.0
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