When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can spoof another user's privileges after completing a successful authentication and obtaining a valid JWT.
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.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Mon, 14 Sep 2026 21:00:00 +0000
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Mon, 14 Sep 2026 10:45:00 +0000
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| Description | Authentication bypass by spoofing vulnerability in Apache Syncope. When the configured JWKS settings for internal JWT authentication are disclosed (at least protocol and key), an attacker can spoof another user's privileges after completing a successful authentication and obtaining a valid JWT. 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. | |
| Title | Apache Syncope: JWT subject spoofing | |
| Weaknesses | CWE-290 | |
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Projects
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Status: PUBLISHED
Assigner: apache
Published:
Updated: 2026-09-14T19:45:29.921Z
Reserved: 2026-09-09T09:19:56.813Z
Link: CVE-2026-87785
Updated: 2026-09-14T18:09:24.963Z
Status : Deferred
Published: 2026-09-14T11:17:05.503
Modified: 2026-09-14T20:58:48.430
Link: CVE-2026-87785
No data.
OpenCVE Enrichment
Updated: 2026-09-14T21:00:09Z