CVE-2026-73191 PUBLISHED

Apache Syncope: CAS service URL injection via Forwarded HTTP headers

Assigner: apache
Reserved: 11.08.2026 Published: 14.09.2026 Updated: 14.09.2026

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.

Product Status

Vendor Apache Software Foundation
Product Apache Syncope
Versions Default: unaffected
  • affected from 3.0.0-M0 to 3.0.16 (incl.)
  • affected from 4.0.0-M0 to 4.0.7 (incl.)
  • affected from 4.1.0-M0 to 4.1.2 (incl.)

Credits

  • meifukun finder

References

Problem Types

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