OpenSearch SQL up to 2.19.5.9/3.6.9.9 SQL Plugin cursor deserialization

Summaryinfo

A vulnerability was found in OpenSearch SQL up to 2.19.5.9/3.6.9.9. It has been rated as very critical. This vulnerability affects unknown code of the component SQL Plugin. The manipulation of the argument cursor leads to deserialization. This vulnerability is listed as CVE-2026-63393. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OpenSearch SQL up to 2.19.5.9/3.6.9.9. It has been rated as very critical. This issue affects an unknown function of the component SQL Plugin. The manipulation of the argument cursor with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-63393 since 07/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/30/2026).

Upgrading to version 2.19.6.0 or 3.7.0.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• OpenSearch

Name

• SQL

Version

• 2.19.5.0
• 2.19.5.1
• 2.19.5.2
• 2.19.5.3
• 2.19.5.4
• 2.19.5.5
• 2.19.5.6
• 2.19.5.7
• 2.19.5.8
• 2.19.5.9
• 3.6.9.0
• 3.6.9.1
• 3.6.9.2
• 3.6.9.3
• 3.6.9.4
• 3.6.9.5
• 3.6.9.6
• 3.6.9.7
• 3.6.9.8
• 3.6.9.9

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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