What is CVE-2026-83497?

CVE-2026-83497 is a high-severity vulnerability in Amazon Opensearch Service, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-08-31.

How severe is CVE-2026-83497?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Amazon Opensearch Service

CVE-2026-83497

Unrestricted deserialization of untrusted data in the cursor pagination component in the OpenSearch SQL plugin allows a remote authenticated user with basic read/search permissions to execute arbitrary code on the server by sending a crafted cursor parameter to the plugins/sql endpoint.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

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

Frequently asked questions

What is CVE-2026-83497?: CVE-2026-83497 is a high-severity vulnerability in Amazon Opensearch Service, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-08-31.
How severe is CVE-2026-83497?: High severity. CVSS v3 base score is 8.8 out of 10.