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  4. CVE 2026 83497 unrestricted java deserialization in opensearch
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Back to active CVEs
High · CVSS 8.8CVE-2026-83497

Unrestricted Java Deserialization in OpenSearch SQL Plugin Cursor PaginationCVE-2026-83497

Answer in brief

CVE-2026-83497 records a High severity (CVSS 8.8) vulnerability in Unrestricted Java Deserialization in OpenSearch SQL Plugin Cursor Pagination. The current sources do not mark it as known exploited. The current feed maps Amazon/Amazon OpenSearch Service (generic), Amazon/Amazon OpenSearch Service (generic), OpenSearch/OpenSearch (generic), OpenSearch/OpenSearch (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 31, 2026Updated Sep 3, 2026Source checked Oct 16, 2026First seen by HOL Aug 31, 2026Material review Sep 3, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Amazon/Amazon OpenSearch Service (generic), Amazon/Amazon OpenSearch Service (generic), OpenSearch/OpenSearch (generic), OpenSearch/OpenSearch (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Amazon/Amazon OpenSearch Servicegeneric2.9Not reported
Amazon/Amazon OpenSearch Servicegeneric>=2.9 <=3.5Not reported
OpenSearch/OpenSearchgeneric2.8Not reported
OpenSearch/OpenSearchgeneric>=2.8 <=3.6Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Amazon/Amazon OpenSearch Service, Amazon/Amazon OpenSearch Service, OpenSearch/OpenSearch.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 31, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 31, 2026

Sources and claim methodology

  • Source referenceaws.amazon.com
  • Source referenceopensearch.org
  • Source referenceopensearch.org
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Deserialization
EPSS
Not reported
CWE IDs
CWE-502
Source
CVE List V5
Source checked
Oct 16, 2026
References
3 linked sources
Open source record