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6.9 Medium

CVE-2026-100647 vLLM versions before 0.29.0 contain a denial-of-service vulnerability in the cache_salt parameter accepted on…

Description

vLLM versions before 0.29.0 contain a denial-of-service vulnerability in the cache_salt parameter accepted on OpenAI-compatible and Anthropic API endpoints, which lacks maximum length validation and is processed on the single EngineCore scheduler thread. Unauthenticated attackers can send HTTP requests with multi-hundred-megabyte salt values that trigger expensive pickle serialization and SHA-256 hashing, stalling the scheduler thread and denying service to all concurrent requests.

Affected products and versions

Product Affected versions Fixed in
vllm 0.29 earliest → < 0.29.0 0.29.0

References

Timeline

  1. Published
  2. Last modified

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