CVE-2026-18952
Missing Input Validation in Threat Intel Feed Parser in OpenSearch Security Analytics Plugin
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.
INFO
Published Date :
Aug. 12, 2026, 7:17 p.m.
Last Modified :
Aug. 12, 2026, 7:17 p.m.
Remotely Exploit :
Yes !
Source :
ff89ba41-3aa1-4d27-914a-91399e9639e5
Affected Products
The following products are affected by CVE-2026-18952
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | ff89ba41-3aa1-4d27-914a-91399e9639e5 | ||||
| CVSS 4.0 | HIGH | ff89ba41-3aa1-4d27-914a-91399e9639e5 | ||||
| CVSS 4.0 | HIGH | ff89ba41-3aa1-4d27-914a-91399e9639e5 |
Solution
- Validate all input parameters for threat intelligence feed parser.
- Sanitize URLs used in threat intel source configuration.
- Implement allow-lists for permitted domains.
- Update the OpenSearch Security Analytics plugin.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18952.
| URL | Resource |
|---|---|
| https://aws.amazon.com/security/security-bulletins/2026-079-aws/ | |
| https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18952 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18952
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18952 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18952 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by ff89ba41-3aa1-4d27-914a-91399e9639e5
Aug. 12, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'AWS', 'product': 'Opensearch', 'versions': [{'status': 'affected', 'version': '2.15.0', 'lessThan': '3.5.0', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Github', 'product': 'Opensearch', 'versions': [{'status': 'affected', 'version': '2.15.0', 'lessThan': '3.5.0', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-918 Added Reference https://aws.amazon.com/security/security-bulletins/2026-079-aws/ Added Reference https://docs.aws.amazon.com/opensearch-service/latest/developerguide/service-software.html