CVE-2026-6959 PUBLISHED

Nomad vulnerable to arbitrary file read/write on client host through symlink attack

Assigner: HashiCorp
Reserved: 24.04.2026 Published: 12.05.2026 Updated: 12.05.2026

HashiCorp Nomad and Nomad Enterprise prior to 2.0.1 are vulnerable to arbitrary file read and write on the client host as the Nomad process user through a symlink attack. This vulnerability (CVE-2026-6959) is fixed in Nomad 2.0.1, 1.11.5 and 1.10.11.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
CVSS Score: 6

Attack Vector	Local	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	HashiCorp
Product	Nomad
Versions	Default: unaffected affected from 0.9.0 to 2.0.1 (excl.)

Vendor	HashiCorp
Product	Nomad Enterprise
Versions	Default: unaffected affected from 0.9.0 to 2.0.1 (excl.)

Credits

This issue was identified by Alex Manson (Aiven / NeuroWinter).

References

https://discuss.hashicorp.com/t/hcsec-2026-14-nomad-arbitrary-file-read-write-on-client-host-through-symlink-attack/77416

Problem Types

CWE-59: Improper Link Resolution Before File Access (Link Following) CWE

Impacts

CAPEC-132: Symlink Attack