Vulnerability in AWS Aws-Api-Mcp-Server
CVE-2026-16584
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.
EPSS: 0.002 (13.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Aws Aws-api-mcp-server — versions 0.2.13
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes)
Frequently asked questions
- What is CVE-2026-16584?
- CVE-2026-16584 is a high-severity vulnerability in AWS Aws-Api-Mcp-Server, classified under Non-exit on Failed Initialization. CVSS score: 7.0/10. Published 2026-07-23.
- How severe is CVE-2026-16584?
- High severity. CVSS v3 base score is 7.0 out of 10.