Vulnerability · Published Aug 12, 2026 · Assigned by AMZN
CVE-2026-18952Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin
High 8.1
In plain English
A high-severity server-side request forgery in Opensearch from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.5%top 55.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | Opensearch | 2.15.0 – before 3.5.0 |
| Github | Opensearch | 2.15.0 – before 3.7.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html patch
- https://aws.amazon.com/security/security-bulletins/2026-079-aws/ vendor-advisory, release-notes
- https://github.com/opensearch-project/security-analytics/security/advisories/GHSA-w946-8jxc-6v3m release-notes