Search threats, CVEs… ⌘K
Back to vendor advisories
AWS Security BulletinsCVE-2026-18952

CVE-2026-18952 - Missing Input Validation in OpenSearch Security Analytics Plugin

Bulletin ID: 2026-079-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/12/2026 11:45 AM PDT Description: OpenSearch is a community-driven, open-source search and analytics suite. We identified CVE-2026-18952, a missing input validation issue in the threat intelligence feed parser of the OpenSearch Security Analytics plugin. This issue may allow an authenticated user with the security_analytics_full_access role to perform server-side request forgery (SSRF) and read local files via a crafted URL parameter to the threat intel source configuration endpoint. Impacted Versions: OpenSearch Security Analytics Plugin (open-source, self-managed): - Affected: >= 2.15.0 - Fixed: >= 3.5.0 Amazon OpenSearch Service (AWS Managed): - Affected: Domains running engine versions >= 2.15.0 - Fixed: Addressed via service software update for engine version 3.5. The affected functionality is not enabled in the default service configuration. Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

Read the vendor bulletin
Not listedCVSS not listedNot listed severity
Scope

What the vendor says is affected

The collected bulletin did not provide a separate affected-products list. Check the original bulletin before making an exposure decision.

Next step

What the vendor recommends

Impacted Versions: OpenSearch Security Analytics Plugin (open-source, self-managed): - Affected: >= 2.15.0 - Fixed: >= 3.5.0 Amazon OpenSearch Service (AWS Managed): - Affected: Domains running engine versions >= 2.15.0 - Fixed: Addressed via service software update for engine version 3.5.

Review the complete instructions on the vendor's site
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed the advisory's last-updated date.
    • The vendor changed the advisory's last-updated date.
    • The vendor changed the advisory's last-updated date.
Timeline

When this advisory changed

  1. Added to SecurityAlert

    We collected the advisory from the official source.

  2. Published by AWS

    The publication date reported by the vendor.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-18952View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor