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CVE-2026-2256
Command Injection in ms-agent (CVE-2026-2256)
Summary
command injection in ms-agent (CVE-2026-2256). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-2256** has been found in ms-agent.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "ms-agent CVE-2026-2256" on the vendor's site.
CVE-2026-2256 (ms-agent) — CWE-77 /
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
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-77) exists in ms-agent.
📍 Affected scope
ms-agent — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ 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 'ms-agent' .` 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
-
1Identify exposure identify
grep -r 'ms-agent' . | 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 `ms-agent` 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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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
PyPI
ms-agent
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.6.0rc1"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-2256
- advisory https://github.com/advisories/GHSA-4gc2-344q-r2rw
- package https://github.com/modelscope/ms-agent
- package https://pypi.org/project/ms-agent
- web https://github.com/Itamar-Yochpaz/CVE-2026-2256-PoC
- web https://medium.com/@itamar.yochpaz/cve-2026-2256-from-ai-prompt-to-full-system-compromise-a4114c718326
- web https://www.hiddenlayer.com/research/indirect-prompt-injection-of-claude-computer-use
- web https://www.kb.cert.org/vuls/id/431821