CVE-2026-16584

HIGH
MEDIUM Priority: 0.02 BB Relevance: 40/100
Published: 2026-07-23 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Passive
S: X
AT: Present
VC: High
VI: High
VA: High

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.

Weakness Classification (1)

Bug Bounty Relevance

40 / 100
✓ No authentication
✓ Low complexity

CVSS Score

7.3 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.23%
Raw Score 0.002270
Percentile 13.4%
Date 2026-11-02

EPSS Trend

2026-11-02
0.00227
2026-11-01
0.00227
2026-10-31
0.00227
2026-10-30
0.00227
2026-10-29
0.00227
2026-10-28
0.00227

Intelligence Sources

nvd ref →