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CVE-2026-34760: vLLM is an inference and serving engine for large language models (LLMs). From version 0.5.5 to befo…

Occurred
Apr 2, 2026
Published
Apr 2, 2026
Source
NVD CVE

Summary

vLLM is an inference and serving engine for large language models (LLMs). From version 0.5.5 to before version 0.18.0, Librosa defaults to using numpy.mean for mono downmixing (to_mono), while the international standard ITU-R BS.775-4 specifies a weighted downmixing algorithm. This discrepancy results in inconsistency between audio heard by humans (e.g., through headphones/regular speakers) and audio processed by AI models (Which infra via Librosa, such as vllm, transformer). This issue has been patched in version 0.18.0.

Tags

  • CVE
  • CVE-2026-34760
  • cvss:MEDIUM

Classification

Category confidence: 90%
Severity confidence: 85%

Rationale: CVE describes a technical discrepancy in audio processing within an LLM serving engine, causing inconsistency but no direct harm.

Classifier: Qwen/Qwen3.5-35B-A3B-FP8

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