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CVE-2026-63393— OpenSearch SQL plugin: Unsafe cursor deserialization permits server code execution

Quick assessment

Affected
opensearch-project sql
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenSearch SQL 支持使用 SQL 和管道处理语言（Piped Processing Language）查询 OpenSearch 数据。在 2.x 系列（从 2.8.0.0 到 2.19.6.0）以及 3.x 系列（早于 3.7.0.0）中，拥有基础读取/搜索权限的远程认证用户可向 接口提交精心构造的 参数，从而触发对不可信数据的不安全反序列化操作，最终导致服务器端任意代码执行。该问题已在仓库发布的 2.19.6.0 和 3.7.0.0 版本中得到修复。

CVSS 8.7 · High
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I. Basic Information for CVE-2026-63393

Vulnerability Information
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Vulnerability Title
OpenSearch SQL plugin: Unsafe cursor deserialization permits server code execution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
opensearch-project sql >= 2.8.0.0, < 2.19.6.0 -

II. Public POCs for CVE-2026-63393

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III. Intelligence Information for CVE-2026-63393

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Other References for CVE-2026-63393 (7)

IV. Related Vulnerabilities

Same vendor: opensearch-project
Same weakness: CWE-502