CVE-2026-92220: vLLM resource consumption through MoRIIO acknowledgement handler request_id

Summary

A vulnerability in vllm-project vLLM 0.26.0 and 0.27.0 affects the MoRIIO Acknowledgement Handler in vllm/distributed/kv_transfer/kv_connector/v1/moriio/moriio_connector.py, specifically MoRIIOConnectorScheduler.request_finished, MoRIIOConnectorWorker.get_finished and MoRIIOWrapper._handle_release_message. Manipulating the request_id or kv_transfer_params argument causes resource consumption, and the attack can be launched remotely. The project was notified early through a pull request but had not responded at the time of disclosure.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Topics

• Inference infrastructure

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