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 Athena service on a regular basis. We identified CVE-2026-77810, in the Neptune connector where a user with access to Neptune through Athena Federated Query could gain access to properties in the Lambda supplying the compute for the connector. Impacted versions: =v2024.15.1 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.