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CVE-2026-41523— vLLM: Security Check Bypass via assert Statement in Activation Function Loading Allows Arbitrary Code Execution

CVSS 7.5 · High EPSS 0.75% · P52

Affected Version Matrix 1

VendorProductVersion RangeStatus
vllm-projectvllm< 0.22.0affected
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I. Basic Information for CVE-2026-41523

Vulnerability Information
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Vulnerability Title
vLLM: Security Check Bypass via assert Statement in Activation Function Loading Allows Arbitrary Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.22.0, an assert-based security check in vLLM's activation function loading allows any unauthenticated attacker to achieve arbitrary code execution on the server by publishing a malicious HuggingFace model, when vLLM runs in Python optimized mode (python -O or PYTHONOPTIMIZE=1). This vulnerability is fixed in 0.22.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
vllm 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
vLLM是vLLM团队开源的一个适用于 LLM 的高吞吐量和内存高效推理和服务引擎。 vLLM 0.22.0之前版本存在安全漏洞，该漏洞源于激活函数加载中的断言安全检查问题，可能导致任意未经验证的攻击者在Python优化模式下发布恶意HuggingFace模型，实现远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
vllm-projectvllm < 0.22.0 -

II. Public POCs for CVE-2026-41523

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7404 chars
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III. Intelligence Information for CVE-2026-41523

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Patches & Fixes for CVE-2026-41523 (1)

Vendor Advisories for CVE-2026-41523 (2)

Same Patch Batch · vllm-project · 2026-06-22 · 8 CVEs total

CVE-2026-487469.1 CRITICALvLLM: OpenAI auth bypass
CVE-2026-542328.8 HIGHvLLM: Dependency Confusion Vulnerability in vLLM Dockerfile
CVE-2026-471556.5 MEDIUMvLLM: Artifact Pin Decay in vLLM allows pinned deployments to load unpinned code, weights,
CVE-2026-542336.5 MEDIUMvLLM: OOM Denial of Service via Audio Decompression Bomb
CVE-2026-542365.3 MEDIUMvLLM: incomplete CVE-2026-22778 fix leaks PIL repr addresses via Anthropic router
CVE-2026-53923vLLM GGUF Kernels: int64_t to int truncation of tensor dimensions causes GPU buffer overfl
CVE-2026-54235vLLM: temperature=NaN and temperature=Infinity bypass validation and propagate to GPU kern

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-94

V. Comments for CVE-2026-41523

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