CyberSecurity News

Enterprises Warned of Attacks Exploiting WSO2 Vulnerability

SecurityWeek

· September 16, 2026

AI summary

Enterprises are being warned about attacks that exploit a specific vulnerability, which can be used to gain access to valuable enterprise data. The vulnerability in question is tracked as CVE-2026-5430 and affects WSO2.

Vulnerabilities mentioned

CVE-2026-5430

CRITICAL

CVSS 10

The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.

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