CRITICALPyPI →
AWS API MCP Server Security Policy Bypass via Startup Initialization Failure
AWS API MCP Server Security Policy Bypass via Startup Initialization Failure
Affected packages
- awslabs-aws-api-mcp-server— 0.2.13 → 1.3.47
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- 0.13%
- EPSS percentile
- 3.0%
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 3%.
Sources
- https://github.com/awslabs/mcp/security/advisories/GHSA-29w2-fq35-v728
- https://nvd.nist.gov/vuln/detail/CVE-2026-16584
- https://github.com/awslabs/mcp/pull/4315
- https://github.com/awslabs/mcp/commit/ab1bbebc097d674c1cdd4bd75a8f313be18473bf
- https://aws.amazon.com/security/security-bulletins/2026-063-aws
- https://github.com/awslabs/mcp
- https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.47
Structured record: https://osv.dev/vulnerability/GHSA-29w2-fq35-v728
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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