early signals oss-security infra

CVE-2026-110985: Apache Kafka: Broker silently skips JWT signature verification for SASL/OAUTHBEARER when the JWKS endpoint URL is not configured

// AI summary

Apache Kafka versions 4.1.0 through 4.1.2, 4.2.0 through 4.2.1, and 4.3.0 have CVE-2026-110985, allowing a broker to silently skip JWT signature verification for SASL/OAUTHBEARER.

// from the source

Posted by Manikumar on Oct 28 Severity: important Affected versions: - Apache Kafka 4.1.0 through 4.1.2 - Apache Kafka 4.2.0 through 4.2.1 - Apache Kafka 4.3.0 Description: A Kafka broker using SASL/OAUTHBEARER with the default validator (sasl.oauthbearer.jwt.validator.class=DefaultJwtValidator) selects its implementation from configuration. When sasl.oauthbearer.jwks.endpoint.url is set, the validator verifies the JWT signature. When that URL is unset (the default) and...
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