Security Bulletin
Summary
HashiCorp Nomad and Nomad Enterprise are vulnerable to cross-namespace authorization bypasses in several read-only API endpoints that may allow an authenticated user with read permissions in one namespace to view information about objects in other namespaces. This vulnerability (CVE-2026-102260) is fixed in Nomad Community Edition 2.1.1 and Nomad Enterprise 2.1.0, 1.11.12, and 1.10.18.
Vulnerability Details
CVEID: CVE-2026-102260
DESCRIPTION: Nomad did not consistently verify that objects returned by certain API endpoints belonged to a namespace the requester was authorized for. When querying across all namespaces, the host volume list endpoint and the search endpoints could return objects from unauthorized namespaces, potentially disclosing object identifiers and volume metadata. Separately, reading a scaling policy by its identifier did not verify the namespace of the policy's target, which could allow a user who already knows the identifier of a scaling policy in another namespace to read its contents. These issues require an authenticated ACL token holding the relevant read capability in at least one namespace, and are limited to information disclosure; they do not allow modifying or operating on objects in other namespaces. Clusters that use only a single namespace are not affected.
CWE: CWE-863: Incorrect Authorization
CVSS Source: HashiCorp Inc.
CVSS Base score: 4.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Nomad Community Edition | affected from 0.11.0 up to 2.1.1 |
| Nomad Enterprise | affected from 0.11.0 up to 2.1.0, unaffected from 1.11.12, 1.10.18 |
Remediation/Fixes
Customers should evaluate the risk associated with this issue and consider upgrading to Nomad Community Edition 2.1.1 or Nomad Enterprise 2.1.0, 1.11.12, or 1.10.18.
Get Notified about Future Security Bulletins
References
Link to HashiCorp Security Bulletin: https://discuss.hashicorp.com/t/hcsec-2026-51-nomad-vulnerable-to-cross-namespace-information-disclosure-in-multiple-endpoints/77929
Acknowledgement
This issue was reported to HashiCorp by Wenhao Wu (Southeast University).
Change History
29 Oct 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:
30 October 2026
Initial Publish date:
29 October 2026
UID
ibm17294745