SSRF in AWS Opensearch
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- AWS Opensearch — versions 2.15.0
- GitHub Opensearch — versions 2.15.0
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, vendor-advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes)
Frequently asked questions
- What is CVE-2026-18952?
- CVE-2026-18952 is a high-severity vulnerability in AWS Opensearch, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.1/10. Published 2026-08-12.
- How severe is CVE-2026-18952?
- High severity. CVSS v3 base score is 8.1 out of 10.