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CVE-2026-44938— Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent

Quick assessment

Affected
SUSE Rancher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rancher Fleet是Rancher公司的一款容器集群监控与管理平台。 Rancher Fleet存在信任管理问题漏洞，该漏洞源于agent-side deployer没有过滤namespaceLabels中的安全敏感密钥，可能导致具有git推送权限的攻击者重写Pod Security Standards执行标签，从而削弱准入控制并部署被PSS策略阻止的工作负载。以下版本受到影响：0.15.0版本至0.15.2之前版本、0.14.0版本至0.14.6之前版本、0.13.0版本至0.13.11之前版本

CVSS 8.8 · High EPSS 0.44% · P36

Affected Version Matrix 4

VendorProduct Version RangeStatus
SUSE Rancher 0.15.0< 0.15.2 affected
0.14.0< 0.14.6 affected
0.13.0< 0.13.11 affected
0.12.0< 0.12.15 affected
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I. Basic Information for CVE-2026-44938

Vulnerability Information
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Vulnerability Title
Fleet has PSS Bypass through addLabelsFromOptions in Fleet Agent
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been identified in Fleet's agent-side deployer, which did not filter security-sensitive keys from namespaceLabels in fleet.yaml (or BundleDeployment.spec.options.namespaceLabels) when applying them to the target namespace. An attacker with git push access to a Fleet-monitored repository could overwrite Pod Security Standards (PSS) enforcement labels on a target namespace. This allows the attacker to weaken admission controls and deploy workloads that PSS policies would otherwise block.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher Fleet 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher Fleet是Rancher公司的一款容器集群监控与管理平台。 Rancher Fleet存在信任管理问题漏洞，该漏洞源于agent-side deployer没有过滤namespaceLabels中的安全敏感密钥，可能导致具有git推送权限的攻击者重写Pod Security Standards执行标签，从而削弱准入控制并部署被PSS策略阻止的工作负载。以下版本受到影响：0.15.0版本至0.15.2之前版本、0.14.0版本至0.14.6之前版本、0.13.0版本至0.13.11之前版本
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 0.15.0 ~ 0.15.2 -

II. Public POCs for CVE-2026-44938

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III. Intelligence Information for CVE-2026-44938

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Vendor Advisories for CVE-2026-44938 (1)

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-522

V. Comments for CVE-2026-44938

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