CVE-2026-93436— vLLM through 0.29.0 Memory Exhaustion via Rejected Requests
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 版本 0.29.0 及更早版本在预填充/解码分离式部署中，未能正确清理被拒绝推理请求的解码端元数据。远程攻击者可以提交 的请求，从而无限制地耗尽解码工作线程（decode-worker）的内存，直至该工作线程重启。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| vllm-project | vllm | ≤ 0.29.0 |
affected |
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I. Basic Information for CVE-2026-93436
Vulnerability Information
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Vulnerability Title
vLLM through 0.29.0 Memory Exhaustion via Rejected Requests
Source: CVE Program / CVE List V5
Vulnerability Description
vLLM through 0.29.0 fails to properly clean up decode-side metadata for rejected inference requests in prefill/decode disaggregated deployments. Remote attackers can submit requests with max_tokens=0 to exhaust decode-worker memory without bound until the worker restarts.
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
在移除最后引用时对内存的释放不恰当(内存泄露)
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-2026-93436
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-93436 (1)
Other References for CVE-2026-93436 (3)
-
vLLM through 0.29.0 Memory Exhaustion via Rejected Requests | Advisories | VulnCheck third-party-advisory
IV. Related Vulnerabilities
Same product: vllm
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CVE-2026-93841
vLLM through 0.29.0 Adjacent-Request Sampler State Corruptio -
CVE-2026-93840
vLLM before 0.29.0 Cross-Request Logits Corruption via allow -
CVE-2026-93592
vLLM before 0.28.0 Denial of Service via negative token ID -
CVE-2026-69147
vLLM: Request-selected PyNvVideoCodec GPU decode bypasses st -
CVE-2026-57173
vLLM: Unauthenticated audio decompression-bomb DoS in /v1/ch
Same vendor: vllm-project
-
CVE-2026-93841
vLLM through 0.29.0 Adjacent-Request Sampler State Corruptio -
CVE-2026-93840
vLLM before 0.29.0 Cross-Request Logits Corruption via allow -
CVE-2026-93592
vLLM before 0.28.0 Denial of Service via negative token ID -
CVE-2026-69147
vLLM: Request-selected PyNvVideoCodec GPU decode bypasses st -
CVE-2026-57173
vLLM: Unauthenticated audio decompression-bomb DoS in /v1/ch
Same weakness: CWE-401
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CVE-2026-92230
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Keycloak-services: keycloak-services: saml redirect deflate -
CVE-2026-81563
SVCB AliasMode additional-data error leaks qpcache reference
V. Comments for CVE-2026-93436
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