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.
Published: 2026-09-17
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 23 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Important


Tue, 22 Sep 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 17 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
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.
Title vLLM through 0.29.0 Memory Exhaustion via Rejected Requests
First Time appeared Vllm
Vllm vllm
Weaknesses CWE-401
CPEs cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*
Vendors & Products Vllm
Vllm vllm
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-24T14:23:01.535Z

Reserved: 2026-09-17T21:50:02.601Z

Link: CVE-2026-93436

cve-icon Vulnrichment

Updated: 2026-09-22T01:58:58.003Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-17T23:18:54.710

Modified: 2026-09-22T20:25:55.870

Link: CVE-2026-93436

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-17T22:15:31Z

Links: CVE-2026-93436 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T01:45:19Z

Weaknesses
  • CWE-401

    Missing Release of Memory after Effective Lifetime

  • CWE-770

    Allocation of Resources Without Limits or Throttling