What is CVE-2026-123548?

CVE-2026-123548 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-2026-123548?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Open Redirect in Openidentityplatform Openam

CVE-2026-123548

OpenIdentityPlatform OpenAM before 16.1.4 contains an open redirect because WS-Federation logout, SAML v2.0 logout and name-identifier management, SAML v2.0 identity provider finder, and some authentication pages do not check destination URLs against allowed lists. Attackers can craft OpenAM-domain links that send users to arbitrary external sites for phishing.

Vulnerability class: Open Redirect

Published 2026-11-08.

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 (9.4th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.4% 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

Openidentityplatform Openam

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-mgwg-24cx-c8w3 (vendor-advisory)
www.vulncheck.com/advisories/openam-before-16.1.4-open-redirect-via-ws-federati… (third-party-advisory)

Frequently asked questions

What is CVE-2026-123548?: CVE-2026-123548 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-2026-123548?: Medium severity. CVSS v3 base score is 4.7 out of 10.