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TI-2026-83439 Aliases CVE-2026-63393

Unsafe deserialization in OpenSearch SQL plugin allows code execution

Priority MEDIUM 40CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

The OpenSearch SQL plugin (opensearch-project sql) is affected from 2.8.0.0 before 2.19.6.0 and from 3.0.0.0-alpha1 before 3.7.0.0. Unsafe deserialization of untrusted data in the cursor parameter of the plugins/sql endpoint lets the server deserialize attacker-supplied objects (CWE-502). A remote authenticated user with basic read and search permissions can supply a crafted cursor parameter to execute arbitrary code on the server.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

OpenSearch SQL supports querying OpenSearch data using SQL and Piped Processing Language. In the 2.x line from 2.8.0.0 until 2.19.6.0, and the 3.x line prior to 3.7.0.0, a remote authenticated user with basic read/search permissions can provide a crafted `cursor` parameter to the `plugins/sql` endpoint and trigger unsafe deserialization of untrusted data, resulting in arbitrary code execution on the server. This issue is fixed in repository releases 2.19.6.0 and 3.7.0.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00499 43rd percentileScored 2026-11-07
Fix Fixed sql (opensearch-project): 2.19.6.0, 3.7.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AWSsql2.8.0.0 to before 2.19.6.0; 3.0.0.0-alpha1 to before 3.7.0.02.19.6.0, 3.7.0.0Patch availableCNA
  • sql VendorAWS Affected 2.8.0.0 to before 2.19.6.0; 3.0.0.0-alpha1 to before 3.7.0.0 Fixed in 2.19.6.0, 3.7.0.0 Patch available CNA

Remediation

Upgrade the OpenSearch SQL plugin to 2.19.6.0 for the 2.x line or to 3.7.0.0 for the 3.x line, the repository releases that fix this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA sql (opensearch-project) Fixed in 2.19.6.0, 3.7.0.0

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-63393
  2. 2026-11-01 Priority changed: MEDIUM → LOW
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: LOW → MEDIUM

References

Other 7

  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-18648 Amazon AWS Amplify CLI before 12.10.1 incorrectly configures the role trust policy of IAM… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2025-03847 Input validation issue in AWS Amplify Studio UI component properties CVSS 4.0CRITICAL 9.0
  • TI-2026-11603 HTTP/2 Stream Parser Confusion Body-Inspection Bypass in Amazon CloudFront with AWS WAF CVSS 4.0HIGH 7.9
See all 383 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences