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CVE-2026-6959
medium
CVSS 6.0
Vulnerability in github.com/hashicorp/nomad (CVE-2026-6959)
Summary
vulnerability in github.com/hashicorp/nomad (CVE-2026-6959). Data can be tampered with by attackers. Mitigation: upgrade to `1.11.0-rc.1.0.20260512123500-2a09fd62c238` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-6959** has been found in github.com/hashicorp/nomad.
Data can be tampered with by attackers. CVSS score: 6.0/10.
What to do: upgrade github.com/hashicorp/nomad to **1.11.0-rc.1.0.20260512123500-2a09fd62c238** or later.
If unsure, ask your IT team or search "github.com/hashicorp/nomad CVE-2026-6959" on the vendor's site.
CVE-2026-6959 (github.com/hashicorp/nomad) — CWE-59 / CVSS v3 6.0
Attack vector: local / no user interaction
Patched: `1.11.0-rc.1.0.20260512123500-2a09fd62c238` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-59) exists in github.com/hashicorp/nomad.
📍 Affected scope
github.com/hashicorp/nomad — .
🔥 Severity
Severity: Medium (CVSS 6.0/10). Data can be tampered with by attackers
🔧 How to fix
Update to **1.11.0-rc.1.0.20260512123500-2a09fd62c238**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'github.com/hashicorp/nomad' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/hashicorp/nomad' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `github.com/hashicorp/nomad` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade github.com/hashicorp/nomad to 1.11.0-rc.1.0.20260512123500-2a09fd62c238ステージング環境で 1.11.0-rc.1.0.20260512123500-2a09fd62c238 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
go
github.com/hashicorp/nomad
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.11.0-rc.1.0.20260512123500-2a09fd62c238"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-6959
- package https://github.com/hashicorp/nomad
- web https://discuss.hashicorp.com/t/hcsec-2026-14-nomad-arbitrary-file-read-write-on-client-host-through-symlink-attack/77416
- web https://github.com/advisories/GHSA-3934-423w-4jq3
- web https://github.com/hashicorp/nomad/commit/2a09fd62c23880ff306499ae03fe64628d82a23f
- web https://github.com/hashicorp/nomad/releases/tag/v2.0.1