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CVE-2026-18656 & CVE-2026-18657 - Issue with Kiro IDE and CLI - Executable Resolution from Untrusted Project Directory on Windows

CVE-2026-19311- Missing Authorization in OpenSearch Alerting Plugin

CVE-2026-18654 - Disabled SSH host key verification in AWS CLI EMR helper commands

CVE-2026-18830 - Issue with Amazon Bedrock AgentCore harness – Insufficient Input Validation

CVE-2026-18953 - Improper limitation of a pathname in AWS Transform MCP Server

CVE-2026-18733 - Prompt injection bypasses shell tool consent gate in Strands Agents Tools

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

Bulletin ID: 2026-105-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/10/2026 08:30 AM PDT Description: AWS Security Agent is a managed AWS service that provides AI-powered code security reviews, threat modeling, and penetration testing. We identified CVE-2026-87912, where a missing S3 bucket ownership verification in the AWS Security Agent plugin in Amazon aws-agents-for-devsecops before version 1.1.0 might allow remote attackers to obtain the private source ar…

CVE-2026-87911

Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

CVE-2026-85788 - Issue with awslabs mysql-mcp-server

Bulletin ID: 2026-103-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/09/2026 09:30 AM PDT Description: We identified an issue in awslabs.mysql-mcp-server (an open-source, self-hosted Model Context Protocol server distributed via github.com/awslabs/mcp and PyPI). In affected versions, under certain conditions the read-only enforcement could be circumvented via SQL inline comments, allowing a statement to run that the read-only check was expected to block. The re…

CVE-2026-84942 - Stored Cross-Site Scripting via Vega Expression Function Bypass in OpenSearch Dashboards

Bulletin ID: 2026-102-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/08/2026 12:30 PM PDT Description: A stored cross-site scripting (XSS) issue in the Vega expression function implementation in OpenSearch Dashboards allows a remote authenticated actor with dashboard write permissions to execute arbitrary JavaScript in the context of other users' browser sessions by saving a crafted Vega visualization. Affedted products & versions: OpenSearch Dashboards (open-s…

CVE-2026-85787 - An incomplete list of disallowed inputs in the SQL validation component in Amazon awslabs postgres-mcp-server to modify data beyond the read-only scope

Bulletin ID: 2026-101-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 13:00 PM PDT Description: We have identified CVE-2026-85787, an incomplete list of disallowed inputs in the SQL validation component in Amazon awslabs postgres-mcp-server before version 1.1.7 might allow an unauthenticated actor to modify data beyond the read-only scope by placing crafted SQL into the content that is submitted when an authenticated user interacts with the MCP server. I…

CVE-2026-85654 - Code injection in the CDK generator in Amazon awslabs.dynamodb-mcp-server

Bulletin ID: 2026-097-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 10:00 AM PDT Description: Amazon awslabs.dynamodb-mcp-server is an open-source Model Context Protocol (MCP) server that enables AI coding assistants to interact with Amazon DynamoDB, including table design, data modeling, and CDK infrastructure generation. We identified CVE-2026-85654, an improper neutralization of special elements used in a template engine in the CDK generator compone…

CVE-2026-85786 - Incomplete fix for CVE-2026-75936 memory-amplification denial of service in Amazon ion-java

Bulletin ID: 2026-100-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 12:30 PM PDT Description: ion-java is a Java library that implements the Amazon Ion data format specification. We identified CVE-2026-85786, memory-amplification denial of service via highly compressed data expansion. ion-java 1.12.0 added a GZIP auto-decompression opt-out for CVE-2026-75936, but the implementation of the opt-out in 1.12.0 was insufficient to address the issue. Impacte…

CVE-2026-85781 - Unverified access point ownership in Amazon EFS CSI Driver

Bulletin ID: 2026-099-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 11:45 AM PDT Description: The Amazon EFS CSI Driver is an open-source Kubernetes Container Storage Interface (CSI) driver that lets Kubernetes workloads use Amazon EFS file systems. We identified CVE-2026-85781, an issue in the driver's volume-deletion logic. When the controller is configured with the non-default --delete-access-point-root-dir=true option, it did not verify that the EF…

CVE-2026-85656 - OS command injection in Amazon log4j-cve-2021-44228-hotpatch

Bulletin ID: 2026-098-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/04/2026 10:30 AM PDT Description: log4j-cve-2021-44228-hotpatch is a tool which injects a Java agent into a running JVM process. The agent will attempt to patch the lookup() method of all loaded org.apache.logging.log4j.core.lookup.JndiLookup instances to unconditionally return the string "Patched JndiLookup::lookup()". It is designed to address the CVE-2021-44228 remote code execution issue i…

CVE-2026-85028: Creation of Temporary File in Directory with Insecure Permissions in AWS FPGA Development Kit

Bulletin ID: 2026-096-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/03/2026 11:00 AM PDT Description: The AWS FPGA Developer Kit is a hardware-software development kit that enables developers to create accelerators for the high-performance accelerator cards on EC2 F2 instances. We identified CVE-2026-85028, where a creation of a temporary file in a directory with insecure permissions in the FPGA management tool installation component in AWS FPGA Development Ki…

CVE-2026-85012 - OS command injection in the Amazon CodeCatalyst blueprints SDK

Bulletin ID: 2026-095-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/03/2026 10:00 AM PDT Description: Amazon CodeCatalyst blueprints are reusable project templates that generate a software project. The @amazon-codecatalyst/blueprints.blueprint npm package is the open source framework that blueprint authors build on, published from github.com/aws/codecatalyst-blueprints. We identified CVE-2026-85012 in the blueprint resynthesis framework. During resynthesis, th…

CVE-2026-84851- Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6

Bulletin ID: 2026-094-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/02/2026 13:30 AM PDT Description: Amazon Ion-C (ion-c) is the C implementation of the Amazon Ion data serialization format. It is distributed as an open-source library (amazon-ion/ion-c) that applications embed to read and write Ion text and binary data. We identified CVE-2026-84851, an uncontrolled recursion issue in versions before 1.1.6 that might allow a remote unauthenticated actor to cra…

CVE-2026-83551 - Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK

Bulletin ID: 2026-093-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/01/2026 11:00 AM PDT Description: SageMaker Python SDK's @step and @remote decorator pipeline component uses an HMAC key to protect the integrity of serialized function payloads stored in S3. We identified an issue where the HMAC secret key is stored in cleartext within pipeline definitions and accessible via the DescribePipeline API. This allows an actor with a role in that account that has p…

CVE-2026-83497 - OpenSearch SQL Plugin - Unrestricted Java Deserialization in Cursor Pagination

Bulletin ID: 2026-092-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/31/2026 11:30 AM PDT Description: OpenSearch is an open-source search and analytics engine. We identified CVE-2026-83497 where a remote authenticated user with basic read/search permissions can run arbitrary code on the server by providing a crafted cursor parameter to the plugins/sql endpoint. Affected Products & Versions: OpenSearch SQL Plugin (open-source, self-managed): - Affected: v2.8 to…

CVE-2026-81849 - Path traversal in the aws:downloadContent plugin in amazon-ssm-agent

Bulletin ID: 2026-091-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/28/2026 11:00 AM PDT Description: AWS Systems Manager Agent (amazon-ssm-agent) is Amazon software that runs on Amazon Elastic Compute Cloud (Amazon EC2) instances, edge devices, on-premises servers, and virtual machines (VMs). Amazon-ssm-agent makes it possible for Systems Manager to update, manage, and configure these resources. We identified CVE-2026-81849, where an improper limitation of a …

CVE-2026-81838 - Zip Slip path traversal in awsdac (diagram-as-code)

Bulletin ID: 2026-090-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/27/2026 13:00 PM PDT Description: awsdac (diagram-as-code) is a CLI tool that generates AWS architecture diagrams from YAML definitions, enabling version-controlled, code-driven diagramming. We identified CVE-2026-81838, a Zip Slip (path traversal) issue. When awsdac extracts a zip archive referenced by a ZipFile resource in a definition file, a crafted archive can write files outside the inte…

CVE-2026-78379 - Consent bypass in Strands Agents Tools python_repl tool

Bulletin ID: 2026-089-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/25/2026 12:00 PM PDT Description: Strands Agents is an open-source Python SDK for building and running AI agents. The strands-agents-tools package provides pre-built tools for use with the SDK, including the python_repl tool, which executes Python code on the agent's host, and the batch tool, which invokes several other tools in a single call. Before executing code, python_repl prompts the ope…

CVE-2026-77811 - Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards

Bulletin ID: 2026-088-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/21/2026 13:00 PM PDT Description: Amazon OpenSearch Service is a managed service that makes it easy to deploy, operate, and scale OpenSearch clusters. We identified CVE-2026-77811, a stored cross-site scripting issue in the dashboards-observability plugin in OpenSearch Dashboards. Improper input validation in the integrations static file endpoint allows a remote authenticated actor with write …

CVE-2026-77810 - Issue with Athena Federated Query Neptune Connector

Bulletin ID: 2026-087-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/21/2026 12:30 PM PDT Description: Amazon Athena is a serverless, interactive query service that lets you analyze data directly in Amazon S3 using standard SQL. Athena Query Federation is a feature that allows you to connect to data sources outside of Amazon S3 like DynamoDB, Azure Synapse, and custom connectors using standard SQL syntax. These connectors are open source and deployed to the Ath…

Issue with FreeRTOS-Kernel - CVE-2026-77234, CVE-2026-77235, CVE-2026-77236, CVE-2026-77237

Bulletin ID: 2026-086-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/21/2026 10:30 AM PDT Description: FreeRTOS-Kernel is a real-time operating system kernel for microcontrollers and small microprocessors. AWS identified four issues with FreeRTOS-Kernel, affecting multiple versions. - CVE-2026-77234: This issue affects configurations that use the FreeRTOS MPU together with software timers; applications that do not use the FreeRTOS MPU are not affected. - CVE-20…

CVE-2026-18420 - Remote Code Execution via Prototype Pollution in OpenSearch Dashboards TSVB Plugin

Bulletin ID: 2026-085-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/20/2026 13:30 PM PDT Description: Improper input validation in the Time Series Visual Builder (TSVB) plugin in OpenSearch Dashboards before 3.8 allows a remote authenticated user with standard data access permissions to execute arbitrary code on the server by sending a crafted JSON payload to the metrics visualization API endpoint. To mitigate this issue, users should upgrade to OpenSearch Das…

CVE-2026-75910 - Issue with Athena Federated Query Clickhouse Connector

Bulletin ID: 2026-084-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/20/2026 13:00 PM PDT Description: Amazon Athena is a serverless, interactive query service that lets you analyze data directly in Amazon S3 using standard SQL. Athena Query Federation is a feature that allows you to connect to data sources outside of Amazon S3 like DynamoDB, Azure Synapse, and custom connectors using standard SQL syntax. These connectors are open source and deployed to the Ath…

CVE-2026-75935 and CVE-2026-75936 - Issue with Amazon ion-java - Memory-amplification denial of service

Bulletin ID: 2026-083-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/18/2026 12:30 PM PDT Description: ion-java is a Java library that implements the Amazon Ion data format specification. We identified CVE-2026-75935, memory-amplification denial of service via declared-length preallocation, and CVE-2026-75936, memory-amplification denial of service via highly compressed data expansion. Affected versions: < 1.12.0 Please refer to the article below for the most u…

CVE-2026-75897 - Uncontrolled resource consumption in OpenSearch Dashboards capabilities route

Bulletin ID: 2026-082-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/18/2026 10:00 AM PDT Description: OpenSearch Dashboards is the open-source visualization and management UI for OpenSearch, and ships as part of Amazon OpenSearch Service. We identified CVE-2026-75897, an improper input validation in the capabilities route handler in OpenSearch Dashboards. The handler does not bound the size of the request payload, which might allow remote attackers to cause a …