VULNERABILITY INTELLIGENCE
CVE-2026-87802
CVSS score9.1 CRITICAL
EPSS probability0.28%
CISA KEVNot currently listed
Published2026-09-14
Last modified2026-09-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
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.
Weakness classification
- CWE-347: Improper Verification of Cryptographic Signature