CVE-2026-73191: CWE-601 URL Redirection to Untrusted Site ('Open Redirect') in Apache Software Foundation Apache Syncope
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.
AI Analysis
Technical Summary
CVE-2026-73191 describes an Open Redirect vulnerability in Apache Syncope when the Syncope SRA is configured for CAS authentication. The vulnerability occurs because the application calculates the target Apereo CAS instance URL by unconditionally trusting client-supplied forwarded HTTP headers. This allows an attacker to craft URLs that redirect users to untrusted sites. The affected versions are Apache Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2. The issue is fixed in versions 4.0.8 and 4.1.3.
Potential Impact
Successful exploitation could allow attackers to redirect users to malicious external sites, potentially facilitating phishing or other social engineering attacks. There is no indication of direct code execution or data compromise from this vulnerability alone.
Mitigation Recommendations
Users should upgrade Apache Syncope to version 4.0.8 or 4.1.3, which contain fixes for this vulnerability. No other mitigation steps are indicated by the vendor advisory.
CVE-2026-73191: CWE-601 URL Redirection to Untrusted Site ('Open Redirect') in Apache Software Foundation Apache Syncope
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.
CVSS v3.1
Score 6.1medium
Affected software
Apache Software Foundation
Apache Syncope
pkg:maven/Apache Software Foundation/org.apache.syncope:syncope-sraRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-73191 describes an Open Redirect vulnerability in Apache Syncope when the Syncope SRA is configured for CAS authentication. The vulnerability occurs because the application calculates the target Apereo CAS instance URL by unconditionally trusting client-supplied forwarded HTTP headers. This allows an attacker to craft URLs that redirect users to untrusted sites. The affected versions are Apache Syncope 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.7, and 4.1.0-M0 through 4.1.2. The issue is fixed in versions 4.0.8 and 4.1.3.
Potential Impact
Successful exploitation could allow attackers to redirect users to malicious external sites, potentially facilitating phishing or other social engineering attacks. There is no indication of direct code execution or data compromise from this vulnerability alone.
Mitigation Recommendations
Users should upgrade Apache Syncope to version 4.0.8 or 4.1.3, which contain fixes for this vulnerability. No other mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-08-11T11:03:09.545Z
- State
- PUBLISHED
Threat ID: 6aa7f77155bf5e2cf5208fb8
Added to database: 09/14/2026, 13:32:33 UTC
Last enriched: 09/14/2026, 13:47:41 UTC
Last updated: 09/15/2026, 05:01:23 UTC
Views: 14
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