GHSA-gg69-9wwp-6jx2 Spring for Apache Pulsar: JsonPulsarHeaderMapper Trusted-Package Prefix Check Allows Unintended Subpackage Deserialization

• Maven org.springframework.pulsar:spring-pulsar: >= 2.0.0, < 2.0.6 → fixed in 2.0.6 • Maven org.springframework.pulsar:spring-pulsar: >= 1.2.0, < 1.2.18 → fixed in 1.2.18 • Maven org.springframework.pulsar:spring-pulsar: <= 1.1.17 (no fix yet)

JsonPulsarHeaderMapper matched type headers against trusted packages using a prefix check, meaning that trusting any package implicitly trusted all of its subpackages. Additionally, an empty trusted-packages configuration fell back to trusting all packages rather than applying a safe default allow-list. Affected versions: Spring for Apache Pulsar 2.0.0 through 2.0.5; 1.2.0 through 1.2.17; 1.1.0 through 1.1.17.