OS Command Injection in mise (CVE-2026-103929)
Summary
OS command injection in mise (CVE-2026-103929). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2026.7.14 or later.
Original description
The description as published by the source.
Summary
Untrusted local .mise.toml [settings] can set the shell interpreter args (unix/windows default_inline / default_file shell_args), yielding arbitrary command execution, because those command-interpreter settings were not added to the global_only denylist the CVE-2026-55448 fix relies on. Code execution from an untrusted repository with no trust prompt for the malicious file, on par with the patched CVE. Confirmed at HEAD 7160170206782fdd3ef287c8302369e32152fb71.
The defect
CVE-2026-55448 and CVE-2026-35533 fixed the fact that a local project [settings] table is harvested by the settings preloader independent of the trust store (an untrusted .mise.toml sets settings without the user ever trusting it). The remediation is a per-field global_only denylist: settings marked global_only are stripped from non-global config. The maintainers marked the command-execution fields they knew about (the three forge credential_command values) but did not mark the four shell-interpreter-args settings, which are also command-execution settings because they choose the interpreter for every command mise spawns.
The global_only denylist and the gap. In settings.toml, the three credential_command sinks are global_only (forgejo.credential_command around line 775, github.credential_command around 828, gitlab.credential_command around 990). The four shell-args settings do not carry global_only:
- unix_default_file_shell_args (settings.toml around 2920)
- unix_default_inline_shell_arg…
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-2026-103929 has been found in mise.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: upgrade mise to 2026.7.14 or later.
If unsure, ask your IT team or search "mise CVE-2026-103929" on the vendor's site.
CVE-2026-103929 (mise) — CWE-78 / CVSS v3 7.8
Attack vector: local / unauthenticated
Patched: 2026.7.14 — 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.
OS command injection (CWE-78) exists in mise.
Check the vendor advisory for the affected versions of mise.
Severity: High (CVSS 7.8/10). Successful exploitation can lead to full system takeover.
Update to 2026.7.14.
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
-
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 2026.7.14ステージング環境で 2026.7.14 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 nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com