CVE-2026-125271
AWS API MCP Server Security Policy Bypass via Incorrect Operation Name Normalization
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
Incorrect normalization of operation names in the custom security policy enforcement in awslabs aws-api-mcp-server before 1.5.1 might allow an actor to execute AWS API operations across AWS services that the operator's security policy was configured to deny or require elicitation for, via calls to operations whose names contain consecutive capital letters. To remediate this issue, users should upgrade to version 1.5.1.
| CWE | CWE-1025 CWE-863 |
| Vendor | aws |
| Product | aws-api-mcp-server |
| Published | Nov 10, 2026 |
| Last Updated | Nov 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
AWS / aws-api-mcp-server
0.2.13 < 1.5.1