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CVE-2026-14891— Nomad vulnerable to sandbox escape in Docker task driver

Quick assessment

Affected
HashiCorp Nomad
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.

HashiCorp nomad是美国HashiCorp公司开源的一个集群管理与调度工具。 HashiCorp nomad存在后置链接漏洞，该漏洞源于Docker任务驱动中的沙箱逃逸问题，可能导致作业提交者即使禁用了卷绑定挂载也能将主机路径绑定挂载到容器中，从而读写主机文件。以下版本受到影响：Nomad 0.4.1版本至2.0.4之前版本及Nomad Enterprise 0.4.1版本至2.0.4之前版本、1.11.8之前版本和1.10.14之前版本。

CVSS 8.7 · High EPSS 0.49% · P40

Affected Version Matrix 2

VendorProduct Version RangeStatus
HashiCorp Nomad 0.4.1< 2.0.4 affected
HashiCorp Nomad Enterprise 0.4.1< 2.0.4 affected
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I. Basic Information for CVE-2026-14891

Vulnerability Information
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Vulnerability Title
Nomad vulnerable to sandbox escape in Docker task driver
Source: CVE Program / CVE List V5
Vulnerability Description
HashiCorp Nomad and Nomad Enterprise are vulnerable to a sandbox escape in the Docker task driver that may allow a job submitter to bind-mount a host path into a container even when volume bind mounts are disabled, potentially leading to reading and writing files on the host. This vulnerability, CVE-2026-14891, is fixed in Nomad Community Edition 2.0.4 and Nomad Enterprise 2.0.4, 1.11.8, and 1.10.14.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
HashiCorp nomad 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HashiCorp nomad是美国HashiCorp公司开源的一个集群管理与调度工具。 HashiCorp nomad存在后置链接漏洞，该漏洞源于Docker任务驱动中的沙箱逃逸问题，可能导致作业提交者即使禁用了卷绑定挂载也能将主机路径绑定挂载到容器中，从而读写主机文件。以下版本受到影响：Nomad 0.4.1版本至2.0.4之前版本及Nomad Enterprise 0.4.1版本至2.0.4之前版本、1.11.8之前版本和1.10.14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
HashiCorp Nomad 0.4.1 ~ 2.0.4 -
HashiCorp Nomad Enterprise 0.4.1 ~ 2.0.4 -

II. Public POCs for CVE-2026-14891

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III. Intelligence Information for CVE-2026-14891

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Vendor Advisories for CVE-2026-14891 (1)

Same Patch Batch · HashiCorp · 2026-07-08 · 5 CVEs total

CVE-2026-14373 7.7 HIGH Nomad Docker driver Linux host namespace bypass
CVE-2026-14362 4.9 MEDIUM Denial of service via crafted push/pull gossip message in memberlist
CVE-2026-14361 4.7 MEDIUM Consul-template is vulnerable to path redirection in writeToFile through symlink attack
CVE-2026-14896 4.2 MEDIUM Nomad vulnerable to cross-namespace host volume claim deletion

IV. Related Vulnerabilities

Same product: Nomad
Same vendor: HashiCorp
Same weakness: CWE-59

V. Comments for CVE-2026-14891

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