CVE-2026-37237: vLLM denial of service via unbounded media fetch from remote URLs

Summary

vLLM versions up to and including 0.17.0 are affected by CVE-2026-37237. The AsyncMediaIO.fetch_audio and AsyncMediaIO.fetch_image functions in multimodal/inputs.py fetch user-supplied media URLs with aiohttp and call r.read() without enforcing a maximum response size. A remote attacker can exhaust server memory by supplying a URL to an arbitrarily large file, causing a Denial of Service.

Mitigation

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

Topics

• Inference infrastructure

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