Kubernetes Platform Vulnerability in vCluster by Loft
CVE-2026-22806

9.1CRITICAL

Key Information:

Vendor

Loft-sh

Status
Loft
Vendor
CVE Published:
29 January 2026

What is CVE-2026-22806?

The vCluster Platform, a Kubernetes solution for managing virtual clusters and ensuring multi-tenancy, is susceptible to a security issue where access keys, intended to have limited scope, can be bypassed. This loophole allows unauthorized access to resources outside the predefined boundaries of the access key. Although users cannot access resources beyond what the access key owner is permitted to reach, this vulnerability poses a significant risk. Users are encouraged to update to versions 4.6.0, 4.5.4, 4.4.2, or 4.3.10 for enhanced security. In the interim, implementing temporary workarounds, such as closely reviewing scoped access keys and restricting user permissions, can help mitigate risk while longer-term solutions are pursued.

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Deploy the Patch

Affected Version(s)

loft < 4.3.10 < 4.3.10

loft >= 4.4.0, < 4.4.2 < 4.4.0, 4.4.2

loft >= 4.5.3, < 4.5.3 < 4.5.3, 4.5.3

References

https://github.com/loft-sh/loft/security/advisories/GHSA-...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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