High severity7.0NVD Advisory· Published Jul 23, 2026· Updated Jul 23, 2026
CVE-2026-16584
CVE-2026-16584
Description
Improper handling of an initialization failure in AWS API MCP Server from 0.2.13 through 1.3.46 might allow an actor to bypass the user-configured security policy and execute AWS API operations that the policy was set to deny or gate. When initialization of the security policy enforcement data fails at server startup, the policy check is skipped for the lifetime of the process. IAM permissions on the configured credentials remain in effect and are unaffected.
To remediate this issue, users should upgrade to version 1.3.47.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
awslabs.aws-api-mcp-serverPyPI | >= 0.2.13, < 1.3.47 | 1.3.47 |
Affected products
3- Range: 0.2.13 - 1.3.46
- Range: 0.2.13 - 1.3.46
Patches
Vulnerability mechanics
References
9- github.com/advisories/GHSA-29w2-fq35-v728ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-16584ghsaADVISORY
- aws.amazon.com/security/security-bulletins/2026-063-awsghsaWEB
- github.com/awslabs/mcp/commit/ab1bbebc097d674c1cdd4bd75a8f313be18473bfghsaWEB
- github.com/awslabs/mcp/pull/4315ghsaWEB
- github.com/awslabs/mcp/security/advisories/GHSA-29w2-fq35-v728nvdWEB
- pypi.org/project/awslabs.aws-api-mcp-server/1.3.47ghsaWEB
- aws.amazon.com/security/security-bulletins/2026-063-aws/nvd
- pypi.org/project/awslabs.aws-api-mcp-server/1.3.47/nvd
News mentions
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