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Posted to dev@syncope.apache.org by Francesco Chicchiriccò <il...@apache.org> on 2026/09/14 08:15:40 UTC

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

Severity: moderate 

Affected versions:

- Apache Syncope (org.apache.syncope:syncope-sra) 3.0.0-M0 through 3.0.16
- Apache Syncope (org.apache.syncope:syncope-sra) 4.0.0-M0 through 4.0.7
- Apache Syncope (org.apache.syncope:syncope-sra) 4.1.0-M0 through 4.1.2

Description:

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.

Credit:

meifukun (finder)

References:

https://syncope.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-73191