CVE-2026-83497 - OpenSearch SQL Plugin - Unrestricted Java Deserialization in Cursor Pagination

unknownCVE-2026-83497

Bulletin ID: 2026-092-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/31/2026 11:30 AM PDT Description: OpenSearch is an open-source search and analytics engine. We identified CVE-2026-83497 where a remote authenticated user with basic read/search permissions can run arbitrary code on the server by providing a crafted cursor parameter to the plugins/sql endpoint. Affected Products & Versions: OpenSearch SQL Plugin (open-source, self-managed): - Affected: v2.8 to v3.6 - Fixed: versions 3.7 and 2.19.6 Amazon OpenSearch Service (AWS Managed): - Affected: v2.9 to v3.5 - Fixed: v2.9 to v3.5 (via service software update) Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

CSIRTS triage

vendor: OpenSearch product: OpenSearch SQL Plugin Unsafe deserialization Remote code executionaffected: 2.8 to 3.6

What: Unrestricted Java deserialization in cursor pagination parameter allows authenticated remote code execution.
Who is affected: OpenSearch SQL Plugin versions 2.8 to 3.6 and Amazon OpenSearch Service versions 2.9 to 3.5 are affected.
Urgency: High; requires authentication but enables arbitrary code execution; affected versions are in active deployment.
Action: Upgrade OpenSearch SQL Plugin to version 3.7 or 2.19.6, and update Amazon OpenSearch Service instances via service software update.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: AWS Security Bulletins (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-09-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://aws.amazon.com/security/security-bulletins/rss/2026-092-aws/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-834970.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-83497	coverage & exploitation status	NVD · CVE.org

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