Disclosure summary
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.
Source-reported weakness categories
CWE-20
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-100647
Open original source · Updated Oct 06, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| vllm | vllm | * {"versionEndExcluding":"0.29.0"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Vendor Advisory
- www.vulncheck.com — Third Party Advisory
PUBLISHED 2026-09-26T10:16:47-04:00
MODIFIED 2026-10-06T15:46:06-04:00
INGESTED 2026-10-10T20:45:41-04:00