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AWS Security Blog

Inside a successful AWS European Sovereign Cloud exercise to demonstrate independent operation

On Saturday, October 24, 2026 we conducted a successful exercise demonstrating that the AWS European Sovereign Cloud can operate without depending on any infrastructure outside the European Union (EU). This was the first public technical exercise demonstrating the independence of a sovereign cloud Region. The AWS European Sovereign Cloud is a new, independent cloud partition […]

Cloud Computing Governance, Risk & Compliance
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AWS Security Bulletins

CVE-2026-116635 - Improper limitation of a pathname to a restricted directory in the deployment status component of the AWS Serverless MCP Server

Bulletin ID: 2026-164-AWS Publication Date: 11/02/2026 13:30 PM PST Description: We identified CVE-2026-116635. Under certain conditions, improper limitation of a pathname to a restricted directory in the deployment status component of the MCP server might allow an actor who can influence the MCP agent to read the contents of JSON files outside the intended deployment status directory. Where write access has been ena…

Vulnerabilities & Zero-Day Cloud Computing
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AWS Security Bulletins

CVE-2026-120497 - Stored cross-site scripting in the HTML report generator of aidlc-traceability in AWS AI-DLC Workflows

Bulletin ID: 2026-163-AWS Publication Date: 11/02/2026 11:00 AM PST Description: aidlc-traceability is an open source command-line tool, formerly published in the awslabs/aidlc-workflows repository, that generates traceability-matrix reports from a project's AI-DLC artifact files. We identified CVE-2026-120497, where stored cross-site scripting (XSS) in the HTML report generator in the aidlc-traceability CLI could al…

Vulnerabilities & Zero-Day Cloud Computing Open Source
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AWS Security Blog

Beyond DKIM key rotation: understanding email replay attacks

As the email administrator for your organization’s domain, you receive a Domain-based Message Authentication, Reporting, and Conformance (DMARC) aggregate report showing email passing DomainKeys Identified Mail (DKIM) verification as though it came from your domain, sent from IP addresses you don’t recognize to recipients you didn’t contact. To clear the issue, you rotate your DKIM […]

Identity & Access Security Governance, Risk & Compliance
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