# CVE-2026-123541: OpenAM before 16.1.4 Open Redirect via SAML 1.x Trusted-Partner Matching

Status: published. Published: 2026-11-08. Updated: 2026-11-10.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- OpenIdentityPlatform / OpenAM (org.openidentityplatform.openam/openam-federation-library): ≥ 0; < 16.1.4 (affected, semver); 16.1.4 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.24% as of 2026-11-10; percentile 14.53%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-601

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-rw43-r238-4c7j (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/openam-before-16.1.4-open-redirect-via-saml-1-x-trusted-partner-matching (CNA: VulnCheck; third-party-advisory)

- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-rw43-r238-4c7j (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/openam-before-16.1.4-open-redirect-via-saml-1-x-trusted-partner-matching (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-123541; retrieved 2026-11-10; source updated 2026-11-10

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123541; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-123541; retrieved 2026-11-10; source updated Not reported

Revision: 86abac8d4a0331551fb6bb02f9a4e22aa871209c1fdd29dfbd1bb96d9ee3ecf9

Canonical: https://y2.dev/cve/CVE-2026-123541

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