What is CVE-2026-75897?

CVE-2026-75897 is a high-severity vulnerability in AWS Amazon Opensearch Service, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2026-08-18.

How severe is CVE-2026-75897?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in AWS Amazon Opensearch Service

CVE-2026-75897

Improper input validation in the capabilities route handler in OpenSearch Dashboards - the size of the request payload is not bounded - might allow remote attackers to cause a denial of service via a crafted HTTP request.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Aws Amazon Opensearch Service
Opensearch Dashboards

Weakness classification (CWE)

CWE-1284 — Improper Validation of Specified Quantity in Input

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)

Frequently asked questions

What is CVE-2026-75897?: CVE-2026-75897 is a high-severity vulnerability in AWS Amazon Opensearch Service, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2026-08-18.
How severe is CVE-2026-75897?: High severity. CVSS v3 base score is 7.5 out of 10.