Threats Tagged 'cve-2026-33557'

Oracle released a Critical Security Patch Update (CSPU) in August 2026 that addresses multiple vulnerabilities in various Oracle Financial Services Enterprise modules and other Oracle products. The update includes 943 security patches targeting Oracle code and third-party components. Oracle strongly recommends applying these patches promptly to mitigate risks, as some vulnerabilities have been subject to attempted exploitation. The advisory covers a wide range of Oracle products and versions, including financial services, databases, middleware, and more. No CVSS score is provided for these vulnerabilities.

A possible security vulnerability has been identified in Apache Kafka. By default, the broker property `sasl.oauthbearer.jwt.validator.class` is set to `org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with the `preferred_username` set to any user, and the broker will accept it. We advise the Kafka users using kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to `org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability. Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.