Vulnerability in mise (CVE-2026-55441)
Summary
Vulnerability in mise (CVE-2026-55441). Successful exploitation can lead to full system takeover. Exploitable via mise.toml. Mitigation: upgrade to 2026.6.4 or later.
Original description
The description as published by the source.
mise manages dev tools like node, python, cmake, and terraform. Prior to 2026.6.4, mise's trust feature gates config files (mise.toml, .tool-versions) through trust_check, but task-include files are loaded on a path that never reaches it. When a directory has a task-include dir (mise-tasks/, .mise/tasks/, …) but no config file, mise falls back to the default includes and renders each task's tera fields — and that tera environment has exec() registered. A {{ exec(command='…') }} in any rendered field runs arbitrary commands the moment the tasks are merely listed. There's no config file to gate on, so no trust prompt ever appears. Read-only commands trigger it: mise tasks, mise task ls, mise run, mise tasks --usage (the query shell completion runs on Tab). The victim only has to cd into a cloned repo and list or tab-complete a task. This vulnerability is fixed in 2026.6.4.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-55441 has been found in mise.
Attackers can target a specific entry point like mise.toml over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.6/10.
What to do: upgrade mise to 2026.6.4 or later.
If unsure, ask your IT team or search "mise CVE-2026-55441" on the vendor's site.
CVE-2026-55441 (mise) — CWE-732 / CVSS v3 8.6
Attack vector: local / unauthenticated
Attack surface: mise.toml / trust_check / load_tasks_in_dir / load_local_tasks_with_context
Patched: 2026.6.4 — 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.
A vulnerability (CWE-732) exists in mise. Attackers reach the vulnerable code path via mise.toml without authentication.
Check the vendor advisory for the affected versions of mise. Attack surface: mise.toml / trust_check / load_tasks_in_dir / load_local_tasks_with_context.
Severity: High (CVSS 8.6/10). Successful exploitation can lead to full system takeover.
Update to 2026.6.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'mise' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'mise' . | 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
miseを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade mise to 2026.6.4ステージング環境で 2026.6.4 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を含めること。
-
3Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com