Security Bulletin
Summary
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.
Vulnerability Details
CVEID: CVE-2026-14891
DESCRIPTION: The driver's containment check did not fully account for symbolic links when validating a bind mount, so a mount that resolved to a location outside the allocation directory could be permitted. This may allow a job to bind-mount a host path into its container and read or write files on the host filesystem, escaping the allocation sandbox, even when volume bind mounts are disabled. Exploitation requires the ability to submit a Docker-driver job, which is an authenticated job submitter when ACLs are enabled or any API client when ACLs are disabled.
CWE: CWE-59: Improper Link Resolution Before File Access (Link Following)
CVSS Source: HashiCorp Inc.
CVSS Base score: 8.7
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Nomad Community Edition | affected from 0.4.1 up to 2.0.4 |
| Nomad Enterprise | affected from 0.4.1 up to 2.0.4, unaffected from 1.11.8, 1.10.14 |
Remediation/Fixes
Customers should evaluate the risk associated with this issue and consider upgrading to Nomad Community Edition 2.0.4 or Nomad Enterprise 2.0.4, 1.11.8, or 1.10.14.
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References
Acknowledgement
This issue was reported to HashiCorp by Volkan Kutal, GitHub handle @KutalVolkan.
Change History
08 Jul 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
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Document Location
Worldwide
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Document Information
Modified date:
08 July 2026
Initial Publish date:
08 July 2026
UID
ibm17279496