High [CVE-2026-73178] Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Syncope
This high-severity Apache Software Foundation advisory covers CVE-2026-73178 affecting Apache Syncope.
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Summary
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Syncope.
An administrator with adequate entitlements can get access via REST to the list of existing Access Tokens, including their signed JWT body. These values can be then used to perform further REST requests, impersonating users with higher administration entitlements.
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.
- 3.0.0-M0 through 3.0.16
- 4.0.0-M0 through 4.0.7
- 4.1.0-M0 through 4.1.2.
- through 4.1.2
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 4.0.8
- 4.1.3
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to version 4.0.8 / 4.1.3, which fix this issue.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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- CVE-2026-109083Nov 2, 2026Improper isolation or compartmentalization vulnerability in Apache Syncope
- CVE-2026-73191Sep 14, 2026URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Apache Syncope
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