CRITICAL 9.1 NVD
CVE-2026-87785
Authentication bypass by spoofing vulnerability in Apache Syncope. When the configured JWKS settings for internal JWT authentication are disclosed (at least
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.
References
- https://lists.apache.org/thread/3t3om8mny7ng52q053pdzpmtdtosnqoo
- http://www.openwall.com/lists/oss-security/2026/09/14/24
- https://www.openwall.com/lists/oss-security/2026/09/14/24
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-09-14 via NVD.
Risk Timeline
CVE Disclosed2026-09-14 · 0 days ago
Remediation Resources
Official Advisory
www.openwall.com/lists/oss-security/2026/09/14/24Official Advisory
www.openwall.com/lists/oss-security/2026/09/14/24Analysis & PoC
lists.apache.org/thread/3t3om8mny7ng52q053pdzpmtdtosnqoo
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