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CVE-2026-114050— vLLM before 0.31.0 Remote Engine Crash via Forged Multimodal UUID

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 0.31.0 之前的版本中，系统会原样使用客户端提供的多模态 UUID 作为缓存标识，且未对缓存命中进行一致性检查，从而导致引擎崩溃。未经身份验证的攻击者可以通过使 P0/P1 处理器的缓存不同步，触发致命的 token 占位符不匹配，致使整个服务实例终止，直至重启才能恢复。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-114050

Vulnerability Information
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Vulnerability Title
vLLM before 0.31.0 Remote Engine Crash via Forged Multimodal UUID
Source: CVE Program / CVE List V5
Vulnerability Description
vLLM before 0.31.0 uses a client-supplied multimodal uuid verbatim as cache identity with no consistency check on cache hits, allowing engine crashes. Unauthenticated attackers can desynchronize the P0/P1 processor caches to trigger a fatal token-placeholder mismatch, killing the entire serving instance until restarted.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vllm-project vllm 0 ~ 0.31.0 -

II. Public POCs for CVE-2026-114050

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III. Intelligence Information for CVE-2026-114050

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Other References for CVE-2026-114050 (2)

Same Patch Batch · vllm-project · 2026-10-21 · 7 CVEs total

CVE-2026-114053 8.1 HIGH vLLM 0.7.3 before 0.31.0 RCE via mm_processor_kwargs.code_revision
CVE-2026-114055 7.5 HIGH vLLM 0.7.3 before 0.31.0 DoS via Unvalidated mm_processor_kwargs
CVE-2026-114052 7.5 HIGH vLLM 0.25.0 before 0.31.0 MOSS-Audio Memory Exhaustion via /tokenize mm_processor_kwargs
CVE-2026-114051 7.5 HIGH vLLM before 0.31.0 Denial of Service via min_tokens in /inference/v1/generate
CVE-2026-114054 6.5 MEDIUM vLLM before 0.31.0 Cross-Request Cache Aliasing via EXIF ImageID and Prefix-Cache Keys
CVE-2026-114049 3.7 LOW vLLM before 0.31.0 Stale allowed_token_ids Mask via InputBatch.condense

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-345

V. Comments for CVE-2026-114050

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