CVE-2026-87912 and CVE-2026-87913: Missing S3 bucket ownership verification in the AWS Security Agent plugin for aws-agents-for-devsecops and MCP Server

Summary

CVE-2026-87912 affects the AWS Security Agent plugin in aws-agents-for-devsecops before version 1.1.0, and CVE-2026-87913 affects the AWS Security Agent MCP server before 0.2.0. Both stem from missing S3 bucket ownership verification, which may let remote attackers obtain the private source archive of a scanned workspace, including credentials and infrastructure state, via a pre-registered storage bucket whose name is derived from a publicly known account identifier. Impacted versions are <=1.0.0 and >=0.1.0 AND <=0.1.5.

Mitigation

Upgrade the aws-agents-for-devsecops plugin to version 1.1.0 or later, and the AWS Security Agent MCP server to version 0.2.0 or later.

Topics

• Model Context Protocol

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