# CVE-2026-77810: AWS Athena Federated Query Neptune Connector credential exposure

Source: https://junglewise.ai/threats/cve-2026-77810-aws-athena-federated-query-neptune-connector-credential-exposure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-21. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-77810 · Severity: critical · CVSS 9.9 · Published 2026-08-21

AWS Athena's Neptune connector is a cloud service that allows users to query graph database data through standard SQL. A flaw in this connector allows anyone with Neptune query access to extract sensitive configuration and credential information from the underlying cloud infrastructure that runs the connector. This could enable attackers to gain deeper access to cloud resources and bypass security controls.

Technologies: [Amazon AWS](https://junglewise.ai/threats/technologies/aws). Vendors: [Amazon](https://junglewise.ai/threats/vendors/amazon).

## Quick answers

**Is CVE-2026-77810 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-77810 being exploited in the wild.

**How severe is CVE-2026-77810?** Critical severity, with a CVSS score of 9.9, published 21 August 2026.

**Which products and versions are affected?** Amazon Athena Federated Query Neptune Connector >=v2024.15.1, <=v2026.28.1.

**Is there a fix for CVE-2026-77810?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-77810 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-77810?** Check whether you run Amazon Athena Federated Query Neptune Connector or Amazon AWS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

CVE-2026-77810 is an information disclosure vulnerability in the AWS Athena Federated Query Neptune connector (versions >=v2024.15.1 and <=v2026.28.1). The vulnerability allows an authenticated user with Neptune query access to extract properties and secrets from the Lambda execution environment that supplies compute for the connector. The attack requires user access to Neptune through Athena Federated Query; no additional network access or code injection is needed. An attacker can leverage this to obtain Lambda environment variables, function configuration, and potentially IAM credentials, leading to further cloud resource compromise. AWS has patched this issue in versions after v2026.28.1.

## Affected products

- Amazon Athena Federated Query Neptune Connector >=v2024.15.1, <=v2026.28.1

## Timeline

- 2026-09-09: disclosed: CVE published and security bulletin issued
- 2026-08-21: advisory: AWS Security Bulletin 2026-087-AWS published

## References

- [https://aws.amazon.com/security/security-bulletins/rss/2026-087-aws/](https://aws.amazon.com/security/security-bulletins/rss/2026-087-aws/)

## Related threats

- [An untrusted search path issue in Aurora PostgreSQL dialect detection in the AWS Advanced Go Wrapper from release 2026-04-06 (awssql/v2.0.0)](https://junglewise.ai/threats/cve-2026-126793-privilege-escalation-in-aurora-postgresql-dialect-detection-in)
- [AWS SDK for pandas EMR unverified bucket ownership](https://junglewise.ai/threats/cve-2026-127119-unverified-ownership-of-the-default-emr-cluster-log-location-in)
- [Amazon mcp-gateway-registry server-side request forgery in registration API](https://junglewise.ai/threats/cve-2026-125926-server-side-request-forgery-in-the-server-registration-and)
- [Amazon mcp-gateway-registry authorization bypass in management API](https://junglewise.ai/threats/cve-2026-100307-missing-authorization-on-the-external-management-api-in-mcp)
- [AWS Kiro CLI incorrect default permissions on session files](https://junglewise.ai/threats/cve-2026-124848-incorrect-default-permissions-on-session-transcripts-and-prompt)