OpenSearch SecurityAnalytics Plugin SSRF via Unvalidated Threat Intel Feed URL
CVE-2026-18952 Published on August 12, 2026
Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin
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.
Vulnerability Analysis
CVE-2026-18952 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-18952 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-18952
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Affected Versions
AWS Opensearch:- Version 2.15.0 and below 3.5.0 is affected.
- Version 2.15.0 and below 3.5.0 is affected.