EUVD-2026-80081
GHSA-72xc-v4m3-9r7g
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Sep 16, 2026
Unbounded buffering of unacknowledged KV-transfer acknowledgements in the MoRIIO connector of vLLM 0.26.0 and 0.27.0 allows a remote, unauthenticated client to grow worker memory indefinitely and degrade or crash LLM inference serving. The root cause is CWE-400 uncontrolled resource consumption in moriio_connector.py, where acknowledgements whose transfer mapping is not yet populated are appended to _pending_unmapped_acks with no TTL or size cap across request_finished, get_finished and _handle_release_message. Impact is availability-only (CVSS 4.0 base 6.9, AV:N/AC:L/PR:N/UI:N/VA:L); no public exploit code and no CISA KEV
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
DescriptionCVE.org
A vulnerability was found in vllm-project vLLM 0.26.0/0.27.0. Affected is the function MoRIIOConnectorScheduler.request_finished/MoRIIOConnectorWorker.get_finished/MoRIIOWrapper._handle_release_message of the file vllm/distributed/kv_transfer/kv_connector/v1/moriio/moriio_connector.py of the component MoRIIO Acknowledgement Handler. Performing a manipulation of the argument request_id/kv_transfer_params results in resource consumption. It is possible to initiate the attack remotely. The project was informed of the problem early through a pull request but has not reacted yet.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
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Exploit-DB