Open Redirect in Openidentityplatform Openam
CVE-2026-123547
OpenAM before 16.1.4 contains an open redirect vulnerability that allows attackers to redirect users to external sites because RelayState is unchecked when no relayStateUrlList is configured. Attackers can craft single sign-on links with a malicious RelayState to send users from the trusted OpenAM origin to phishing sites and bypass URL filters.
Vulnerability class: Open Redirect
Published .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fhqm-62hv-4phw (vendor-advisory)
- www.vulncheck.com/advisories/openam-before-16.1.4-open-redirect-via-saml-2.0-re… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123547?
- CVE-2026-123547 is a medium-severity vulnerability in Openidentityplatform Openam, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.7/10. Published 2026-11-08.
- How severe is CVE-2026-123547?
- Medium severity. CVSS v3 base score is 4.7 out of 10.