CVE-2026-92220 - Vulnerability Details

- vllm-project vLLM MoRIIO Acknowledgement moriio_connector.py MoRIIOWrapper._handle_release_message resource consumption

Description

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.

Published: 2026-09-16

Score: 6.9 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

A flaw in vLLM's MoRIIO Acknowledgement Handler permits an attacker to manipulate request identifiers or transfer parameters to trigger excessive resource consumption, potentially degrading service availability.

Affected Systems

vLLM v0.26.0 and v0.27.0 released by the vllm-project are affected. The vulnerability resides in the file vllm/distributed/kv_transfer/kv_connector/v1/moriio/moriio_connector.py within the MoRIIO component.

Risk and Exploitability

The CVSS score of 6.9 indicates moderate severity. EPSS scoring below 1% reflects a low probability that this flaw will be exploited in the wild, and the vulnerability is not yet catalogued in CISA's KEV. Nonetheless, the attack vector appears to be remote, relying on malformed request or parameter input. No official patch exists at this time, so mitigation focuses on disabling the vulnerable path and implementing input validation.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

vllm-project

vLLM

affected

Version	Status	Constraints
`0.26.0`	affected	—
`0.27.0`	affected	—

No data.

Vendor Product Confidence Versions

Vllm-project

Vllm

95%

Version	Status	Scheme	Platform
`0.26.0`	affected	semver	—
`0.27.0`	affected	semver	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Update to a patched version of vLLM (once available).
Restrict or disable the MoRIIO Acknowledgement Handler to eliminate the vulnerable code path.
Sanitize request_id and kv_transfer_params inputs, limiting size and content to prevent resource exhaustion.
Continuously monitor resource consumption and configure alerts for abnormal behavior.

Generated by OpenCVE AI on September 16, 2026 at 17:10 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00521.

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/vllm-project/vllm/
https://github.com/vllm-project/vllm/pull/50674
https://nvd.nist.gov/vuln/detail/CVE-2026-92220
https://vuldb.com/cve/CVE-2026-92220
https://vuldb.com/submit/934149
https://vuldb.com/vuln/404470
https://vuldb.com/vuln/404470/cti
https://www.cve.org/CVERecord?id=CVE-2026-92220

History

Wed, 16 Sep 2026 20:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 16 Sep 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-770
References		https://nvd.nist.gov/vuln/detail/CVE-2026-92220 https://www.cve.org/CVERecord?id=CVE-2026-92220
Metrics	threat_severity `None`	threat_severity `Important`

Wed, 16 Sep 2026 02:30:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		vllm-project vLLM MoRIIO Acknowledgement moriio_connector.py MoRIIOWrapper._handle_release_message resource consumption
First Time appeared		Vllm-project Vllm-project vllm
Weaknesses		CWE-400 CWE-404
CPEs		cpe:2.3:a:vllm-project:vllm::::::::
Vendors & Products		Vllm-project Vllm-project vllm
References		https://github.com/vllm-project/vllm/ https://github.com/vllm-project/vllm/pull/50674 https://vuldb.com/cve/CVE-2026-92220 https://vuldb.com/submit/934149 https://vuldb.com/vuln/404470 https://vuldb.com/vuln/404470/cti
Metrics		cvssV2_0 `{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:ND/RC:UR'}` cvssV3_0 `{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:R'}` cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:R'}` cvssV4_0 `{'score': 6.9, 'vector': '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/E:X'}`

Subscriptions

Vllm-project Vllm

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-09-16T02:15:10.740Z

Updated: 2026-09-16T19:40:15.559Z

Reserved: 2026-09-15T18:42:00.653Z

Link: CVE-2026-92220

Vulnrichment

Updated: 2026-09-16T19:40:11.943Z

NVD

Status : Deferred

Published: 2026-09-16T03:17:00.407

Modified: 2026-09-16T20:17:47.403

Link: CVE-2026-92220

Redhat

Severity : Important

Publid Date: 2026-09-16T02:15:10Z

Links: CVE-2026-92220 - Bugzilla

OpenCVE Enrichment

Updated: 2026-09-16T17:15:14Z

Weaknesses

CWE-400
Uncontrolled Resource Consumption
CWE-404
Improper Resource Shutdown or Release
CWE-770
Allocation of Resources Without Limits or Throttling

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

Exploitation none

Automatable yes

Technical Impact partial

Subscriptions

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