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CVE-2026-100648— vllm before 0.29.0 Uncontrolled Resource Consumption via Audio Decoding

Quick assessment

Affected
vllm-project vllm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 vLLM 版本低于 0.29.0 的情况下，多模态聊天音频解码功能未能正确强制执行 所设定的音频文件最大体积限制，导致未认证客户端可以绕过文件大小限制。攻击者可通过聊天接口提交超大的音频文件，在解码过程中消耗大量的内存和 CPU 资源，从而可能引发拒绝服务（DoS）或其他资源耗尽问题。

CVSS 5.3 · Medium EPSS 0.33% · P24
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I. Basic Information for CVE-2026-100648

Vulnerability Information
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Vulnerability Title
vllm before 0.29.0 Uncontrolled Resource Consumption via Audio Decoding
Source: CVE Program / CVE List V5
Vulnerability Description
vllm before 0.29.0 fails to enforce VLLM_MAX_AUDIO_CLIP_FILESIZE_MB limit in multimodal chat audio decoding, allowing unauthenticated clients to bypass file size restrictions. Attackers can submit oversized audio files through chat endpoints to consume excessive memory and CPU resources during decoding.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vllm-project vllm 0 ~ 0.29.0 -

II. Public POCs for CVE-2026-100648

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III. Intelligence Information for CVE-2026-100648

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Vendor Advisories for CVE-2026-100648 (1)

Other References for CVE-2026-100648 (1)

Same Patch Batch · vllm-project · 2026-09-26 · 8 CVEs total

CVE-2026-100654 6.5 MEDIUM vLLM before 0.29.0 Denial of Service via out-of-range stop_token_ids
CVE-2026-100650 6.5 MEDIUM vLLM before 0.29.0 Resource Exhaustion via Unbounded Media Materialization
CVE-2026-100651 6.5 MEDIUM vllm before 0.29.0 Denial of Service via Decoder Prompt Length Bypass
CVE-2026-100653 6.5 MEDIUM vLLM 0.22.1 before 0.28.0 Incomplete Artifact Pin Propagation
CVE-2026-100652 5.9 MEDIUM vLLM 0.22.0 through 0.23.0 Denial of Service via stop_token_ids
CVE-2026-100647 5.3 MEDIUM vLLM before 0.29.0 CPU Exhaustion via unbounded cache_salt
CVE-2026-100649 3.7 LOW vLLM before 0.29.0 Resource Limit Bypass via Sampler Subclass

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-400

V. Comments for CVE-2026-100648

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