CVE-2026-73191

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Apache Syncope. When the Syncope SRA is configured for CAS authentication, the target Apereo CAS instance's URL is calculated by unconditionally looking at client-supplied forwarded HTTP headers. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.7, from 4.1.0-M0 through 4.1.2. Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.

Score

CVSS 3.1 6.1 Medium

Status

Deferred - security@apache.org

Published

2026-09-14

Last modified

2026-09-14

Weaknesses

CWE-601

Affected products

• Apache Syncope (Apache Software Foundation)

References

• https://lists.apache.org/thread/vx9bons1znhdkdpsxwjpy6qqqjc8xqtk
• http://www.openwall.com/lists/oss-security/2026/09/14/5