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CVE-2026-18952

HIGHCVSS 8.1/10EPSS 0.32%

Last modified

CVE-2026-18952 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS 4.0
8.6/10

CVSS:4.0/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

EPSS Probability
0.32%

25.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
AWSOpensearch>= 2.15.0, < 3.5.0
GithubOpensearch>= 2.15.0, < 3.7.0

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-18952?
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.
How severe is CVE-2026-18952?
CVE-2026-18952 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.
How do I fix CVE-2026-18952?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST