AWS API MCP server security policy bypass via name normalization

high severity · published 2026-11-10

An attacker can run AWS API operations across services that your security policy was configured to deny or require elicitation for, by calling operations whose names contain consecutive capital letters.

Fixed in: 1.5.1

CVE: CVE-2026-125271

Source: NVD

Am I affected?

You are affected if the installed version is older than 1.5.1. Check the version you have and update to 1.5.1 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 2370 and your operating system.