CVE-2026-51083
Received Received - Intake

Incorrect Access Control in Proxmox Virtual Environment Allows Password Hash Exposure

Publication date: 2026-07-17

Last updated on: 2026-07-17

Assigner: MITRE

Description
Incorrect access control in Proxmox Virtual Environment (PVE) 9.x qemu-server before 9.1.8 and 8.x before 8.4.8 allows users within limited privileges to obtain hashed passwords via the cloudinit/dump API.

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Meta Information

Published
2026-07-17
Last Modified
2026-07-17
Generated
2026-07-17
AI Q&A
2026-07-17
EPSS Evaluated
N/A
NVD
CVE-2026-51083
EUVD
EUVD-2026-45183

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
proxmox virtual_environment to 9.1.8 (exc)
proxmox virtual_environment to 8.4.8 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

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Executive Summary

This vulnerability is an incorrect access control issue in Proxmox Virtual Environment (PVE) versions 9.x before 9.1.8 and 8.x before 8.4.8. It allows users with limited privileges to access hashed passwords through the cloudinit/dump API.

Detection Guidance

To detect this vulnerability, check the version of qemu-server installed on your Proxmox VE system. If you are running version 9.1.8 or later for PVE 9.x, or 8.4.8 or later for PVE 8.x, the vulnerability is not present. Otherwise, the system is vulnerable.

Impact Analysis

An attacker with limited access could exploit this to obtain hashed passwords, potentially leading to unauthorized access to systems or data if the hashes are cracked.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating privacy regulations like GDPR or HIPAA due to improper access control.

Mitigation Strategies

Update Proxmox Virtual Environment (PVE) qemu-server to version 9.1.8 or later for PVE 9.x, or 8.4.8 or later for PVE 8.x to address the incorrect access control issue.

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