CVE Watch7 oct 2026

CVE-2026-100654

vLLM before 0.29.0 accepts user-controlled stop_token_ids on the OpenAI-compatible POST /v1/completions and POST /v1/chat/completions endpoi

CVSS

6.5

Medio

EPSS

0.3%

p24

KEV

—

Exploit Today

0-100

Publicado: 26 sept 2026 · Última mod.: 7 oct 2026 · CWE-129

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-09-272026-10-25

Descripción técnica

vLLM before 0.29.0 accepts user-controlled stop_token_ids on the OpenAI-compatible POST /v1/completions and POST /v1/chat/completions endpoints but validates only that the values are integers, not that each token id is within the model vocabulary/logits range. When min_tokens > 0, the stop token ids are used as logits indices to suppress stop tokens, so an out-of-range id reaches a CUDA indexing operation (index_put_) and triggers a device-side assertion. An authenticated API user can send a single malformed completion request that returns 500 Internal Server Error and puts EngineCore into a fatal state, causing subsequent requests to fail until the service is restarted (denial of service).

Referencias oficiales

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