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9.4 Critical

CVE-2026-44939 Command injection through unsanitized YAML parameter in Rancher

Description

A command injection vulnerability in the Rancher Manager cluster before 2.14.2 import endpoint /v3/import/{token}_{clusterId}.yaml through unsanitized YAML parameters could allow remote attackers to break out of an image, and execute e.g. malicious containers.

CVSS 4.0 detail

Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Exploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
None
Interaction
Passive
Confidentiality
High
Integrity
High
Availability
High
Confidentiality of other systems
High
Integrity of other systems
High
Availability of other systems
High

Affected products and versions

Product Affected versions Fixed in
Rancher 2.14 2.14.0 → < 2.14.2 2.14.2
Rancher 2.13 2.13.0 → < 2.13.6 2.13.6
Rancher 2.12 2.12.0 → < 2.12.10 2.12.10
Rancher 2.11 2.11.0 → < 2.11.14 2.11.14
Rancher 2.10 2.10.0 → < 2.10.12 2.10.12

Other CVEs of Rancher

The 86 CVEs of Rancher →
CVE-2026-88811 Missing filtering in the SUSE Rancher Manager meta proxy could cause passed in rancher credentials to be leaked to cloud… 9.1 Critical CVE-2026-88810 A privilege escalation issue was discovered in Rancher Manager's role-based access control 7.2 High CVE-2026-88809 A security vulnerability exists in the SUSE Rancher Manager meta proxy endpoint (/meta/proxy) 7.6 High CVE-2026-94290 SUSE Rancher Fleet clusters reference a kubeconfig secret that the controller uses to install and manage a Fleet agent… 9.1 Critical
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