# CVE-2026-18952: Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin

> CVE-2026-18952: Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin. CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-18952
Last updated: 2026-08-21T19:17:00Z

- Published: 2026-08-12 18:42 UTC · Updated: 2026-08-21 19:17 UTC · Assigner: AMZN
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.52%, 44th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-918

## Description

Missing input validation in the threat intelligence feed parser in the OpenSearch Security Analytics plugin might allow an authenticated remote user to perform server-side request forgery and read local files via a crafted URL parameter to the threat intel source configuration endpoint.

## Affected vendors and products

- AWS: Opensearch
- Github: Opensearch

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)
- [GitHub](https://rewindex.com/company/github.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-18952)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-18952)
- [https://aws.amazon.com/security/security-bulletins/2026-079-aws/](https://aws.amazon.com/security/security-bulletins/2026-079-aws/)
- [https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html)
- [https://github.com/opensearch-project/security-analytics/security/advisories/GHSA-w946-8jxc-6v3m](https://github.com/opensearch-project/security-analytics/security/advisories/GHSA-w946-8jxc-6v3m)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-18952 · Markdown: https://rewindex.com/cve/CVE-2026-18952.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-18952 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:51:43.762Z