aws-mcp has a Command Injection Remote Code Execution Vulnerability
CVE-2026-5059 · GHSA-fgmx-xfp3-w28p · PYSEC-2026-288 · published 11 Apr 2026
How serious is it
- Severity: critical, CVSS score 9.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-5059?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
aws-mcp(PyPI) <= 1.7.0
How to check
- Run
pip show aws-mcpin your project to see the installed version, including copies pulled in by other packages. - Or paste your lockfile into the checker: it lists every package with a known vulnerability, this one included.
- Or run
npx shippable-dev scan localhost:3000in your project folder. It reads your lockfile and flags this vulnerability along with every other known one.
How to fix
Copies a prompt for Claude Code, Cursor or Codex: it checks your lockfiles for this and upgrades it.
- No fixed version of
aws-mcpyet. Replace or remove it, or apply the workaround in the advisory below. - If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
aws-mcp-server AWS CLI Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of aws-mcp-server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of the allowed commands list. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the MCP server. Was ZDI-CAN-27969.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- nvd.nist.gov/vuln/detail/CVE-2026-5059
- www.zerodayinitiative.com/advisories/ZDI-26-245
- github.com/pypa/advisory-database/tree/main/vulns/aws-mcp/PYSEC-2026-288.yaml
- pypi.org/project/aws-mcp
- github.com/advisories/GHSA-fgmx-xfp3-w28p
- github.com/alexei-led/aws-mcp-server
Merged from GitHub Advisory Database, OSV. Last updated 28 Oct 2026. All vulnerabilities · RSS · JSON