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CVE-2026-116178— vLLM 0.20.0 before 0.30.0 DoS via /inference/v1/generate mm_placeholders

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.

vLLM 0.20.0 至 0.30.0（不含 0.30.0）版本中存在一个拒绝服务漏洞，允许远程攻击者通过向解耦的 端点发送不一致的多模态元数据，导致引擎崩溃。攻击者可重放一个有效的多模态项，并构造重复或重叠的 范围，或使 与 列表不匹配，从而在 Qwen2.5-VL 的位置构建过程中生成负向文本跨度，最终终止引擎运行。

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-116178

Vulnerability Information
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Vulnerability Title
vLLM 0.20.0 before 0.30.0 DoS via /inference/v1/generate mm_placeholders
Source: CVE Program / CVE List V5
Vulnerability Description
vLLM from 0.20.0 before 0.30.0 contains a denial of service vulnerability that allows remote attackers to crash the engine by sending inconsistent multimodal metadata to the disaggregated /inference/v1/generate endpoint. Attackers can replay a valid multimodal item with repeated or overlapping mm_placeholders ranges or mismatched kwargs_data and mm_hashes lists, producing a negative text span in Qwen2.5-VL position construction that terminates the engine.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vllm-project vllm 0.20.0 ~ 0.30.0 -

II. Public POCs for CVE-2026-116178

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III. Intelligence Information for CVE-2026-116178

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Vendor Advisories for CVE-2026-116178 (2)

Same Patch Batch · vllm-project · 2026-10-25 · 10 CVEs total

CVE-2026-116176 8.2 HIGH vLLM 0.9.2 before 0.24.0 SSRF via X-Request-Id in P2pNcclConnector
CVE-2026-116180 7.7 HIGH vLLM from 0.8.5 before 0.31.0 Cross-Tenant DoS via Uninitialized LogprobsTensors
CVE-2026-116179 7.5 HIGH vLLM 0.18.0 before 0.31.0 Memory Exhaustion via media_io_kwargs num_frames Override
CVE-2026-116177 7.5 HIGH vLLM 0.10.2 before 0.25.0 DoS via Nemotron-VL Processor Decompression-Bomb Guard Bypass
CVE-2026-116175 6.5 MEDIUM vLLM 0.19.0 before 0.24.0 Audio Decompression Bomb DoS via Chat Completions
CVE-2026-116181 6.5 MEDIUM vLLM 0.20.1 before 0.29.0 DoS and GPU Out-of-Bounds Write via stop_token_ids
CVE-2026-116174 5.9 MEDIUM vLLM 0.22.0 before 0.24.0 Denial of Service via Rust gRPC Generate
CVE-2026-116172 5.9 MEDIUM vLLM 0.22.0 before 0.24.0 DoS via Rust gRPC CandidateTokens.top_n
CVE-2026-116173 5.9 MEDIUM vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_ids

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-20