CVE-2026-73191 — Apache Syncope: CAS service URL injection via Forwarded HTTP headers

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Syncope	affected 3.0.0-M0 through 3.0.16; affected 4.0.0-M0 through 4.0.7; affected 4.1.0-M0 through 4.1.2

CWE

CWE-601

References

https://lists.apache.org/thread/vx9bons1znhdkdpsxwjpy6qqqjc8xqtk

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/09/14/5

CISA-ADP

No English description supplied.

No references supplied.