CVE-2026-18952

Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin

HIGH
8.1
CVSS Score
Published: August 12, 2026 at 06:42 PM UTC
Updated: August 21, 2026 at 07:17 PM UTC
2 products affected across 2 vendorsOpenSearchOpenSearch

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Severity
HIGH8.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.15.0 ≤ v < 3.5.02.15.0
Affected range stops below 3.5.0, so it looks safe — our inference, not a vendor statement
OpenSearch· GitHubgithub-action
50%
2.15.0 ≤ v < 3.7.02.15.0
Affected range stops below 3.7.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHAMZN
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-918

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