CRITICAL 9.1 NVD
CVE-2026-87802
Improper verification of cryptographic signature vulnerability in Apache Syncope. When SRA is configured for OAuth 2.0 without JWKS set URI assigned, an atta
Improper verification of cryptographic signature vulnerability in Apache Syncope.
When SRA is configured for OAuth 2.0 without JWKS set URI assigned, an attacker can forge arbitrary JWTs to impersonate any user identity and permissions, gaining full access to services proxied by SRA.
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/gx83cootj00kn8hqd73x1bp8441np33d
- http://www.openwall.com/lists/oss-security/2026/09/14/25
- https://www.openwall.com/lists/oss-security/2026/09/14/25
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/2026/09/14/25Official Advisory
www.openwall.com/lists/oss-security/2026/09/14/25Analysis & PoC
lists.apache.org/thread/gx83cootj00kn8hqd73x1bp8441np33d
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