OpenSearch unauthorized data access on fields protected by field level security if field is a member of an object
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- Information disclosure
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-200.
Summary
### Impact OpenSearch versions 2.19.2 and earlier improperly apply Field Level Security (FLS) rules on fields which are not at the top level of the source document tree (i.e., which are members of a JSON object). If an FLS exclusion rule (like `~object`) is applied to an object valued attribute in a source document, the object is properly removed from the `_source` document in search and get results. However, any member attribute of that object remains available to search queries. This allows to reconstruct the original field contents using range queries. ### Patches The issue has been resolved in OpenSearch 3.0.0 and OpenSearch 2.19.3. ### Workarounds If FLS exclusion rules are used for object valued attributes (like `~object`), add an additional exclusion rule for the members of the object (like `~object.*`).
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | org.opensearch.plugin:opensearch-security (Maven) | before 2.19.3.0 | 2.19.3.0 | Patch available | GHSA-2rjv-cv85-xhgm |
- org.opensearch.plugin:opensearch-security (Maven) Vendor— Affected before 2.19.3.0 Fixed in 2.19.3.0 Patch available GHSA-2rjv-cv85-xhgm
Remediation
- Fix · GHSA-2rjv-cv85-xhgm org.opensearch.plugin:opensearch-security (Maven) Fixed in 2.19.3.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-2rjv-cv85-xhgm
References
Sources
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