# CVE-2026-18952: OpenSearch Security Analytics Plugin missing input validation

Source: https://junglewise.ai/threats/cve-2026-18952-opensearch-security-analytics-plugin-missing-input-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-09. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-18952 · Severity: high · Published 2026-09-09

OpenSearch Security Analytics Plugin contains a missing input validation vulnerability that could allow an attacker to submit malformed or malicious data to the analytics component. Depending on how the plugin processes this data, an attacker could potentially achieve code execution, data exposure, or cause service disruption.

Technologies: [Amazon AWS](https://junglewise.ai/threats/technologies/aws). Vendors: [Amazon](https://junglewise.ai/threats/vendors/amazon), [Amazon Web Services](https://junglewise.ai/threats/vendors/amazon-web-services).

## Quick answers

**Is CVE-2026-18952 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18952 being exploited in the wild.

**How severe is CVE-2026-18952?** High severity, published 9 September 2026.

**Which products and versions are affected?** AWS OpenSearch Security Analytics Plugin.

**Is there a fix for CVE-2026-18952?** 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-2026-18952 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-18952?** Check whether you run Amazon AWS or Amazon Web Services OpenSearch Security Analytics Plugin. 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

The vulnerability is a missing input validation issue in the OpenSearch Security Analytics Plugin. The plugin fails to adequately validate user-supplied input before processing it, which could allow an attacker to submit malformed or malicious data to the analytics component. The attack vector and specific impact depend on the plugin's architecture and how it processes the unvalidated input; potential consequences could range from injection attacks to denial of service. No evidence of active exploitation in the wild has been reported. Patch or mitigation guidance from AWS should be consulted for remediation details.

## Affected products

- AWS OpenSearch Security Analytics Plugin

## Timeline

- 2026-09-09: disclosed

## References

- [https://aws.amazon.com/security/security-bulletins/rss/2026-079-aws/](https://aws.amazon.com/security/security-bulletins/rss/2026-079-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)