CVE-2026-63393
OpenSearch SQL plugin: Unsafe cursor deserialization permits server code execution
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| sql opensearch-project |
>= 2.8.0.0, < 2.19.6.0 (affected) >= 3.0.0.0-alpha1, < 3.7.0.0 (affected) |
CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
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 | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/opensearch-project/sql/security/advisories/GHSA-r8cv-xvqm-4qj4CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/opensearch-project/sql/pull/5469CNA: GitHub_M · x_refsource_MISC
- https://github.com/opensearch-project/sql/pull/5572CNA: GitHub_M · x_refsource_MISC
- https://github.com/opensearch-project/sql/commit/402a284f1dff3545236480b67f860aa93fb667deCNA: GitHub_M · x_refsource_MISC
- https://github.com/opensearch-project/sql/commit/9ab50384d3ad571a14211415fba2f6d26d4c80dbCNA: GitHub_M · x_refsource_MISC
- https://github.com/opensearch-project/sql/releases/tag/2.19.6.0CNA: GitHub_M · x_refsource_MISC
- https://github.com/opensearch-project/sql/releases/tag/3.7.0.0CNA: GitHub_M · x_refsource_MISC
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