CVE-2026-63393

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.

• CWE-502

• https://github.com/opensearch-project/sql/commit/402a284f1dff3545236480b67f860aa93fb667de
• https://github.com/opensearch-project/sql/commit/9ab50384d3ad571a14211415fba2f6d26d4c80db
• https://github.com/opensearch-project/sql/pull/5469
• https://github.com/opensearch-project/sql/pull/5572
• https://github.com/opensearch-project/sql/releases/tag/2.19.6.0
• https://github.com/opensearch-project/sql/releases/tag/3.7.0.0
• https://github.com/opensearch-project/sql/security/advisories/GHSA-r8cv-xvqm-4qj4

Published

Oct 30, 2026

Last Modified

Oct 30, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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