CVE-2026-105927

The Apache Pulsar WebSocket service (versions 2.3.0 before 4.0.14 and 4.1.0 before 4.2.5) contains an improper authorization vulnerability. An authenticated user with CONSUME permissions on a subscribed topic can exploit the deadLetterTopic query parameter to inject messages into arbitrary topics...

EUVD-2026-107426

The Apache Pulsar WebSocket service allows a WebSocket consumer to configure a dead letter policy through query parameters of the consumer endpoint, including the deadLetterTopic parameter that names the topic to which messages are written after the maximum number of redeliveries is exceeded. Whe...