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CVE-2026-73191

Apache Syncope: CAS service URL injection via Forwarded HTTP headers

Published: Sep 14, 2026Updated: Sep 14, 2026 Sources: CVE List NVDCWE-601
6.1MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 78.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-601

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
Apache SyncopeOn-prem
Enterprise Software

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

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

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