OpenSearch has a bypass of REST Layer Authorization Using Malformed Paths
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-863.
Summary
### Description A flaw was identified in the OpenSearch REST layer that could allow authorization checks to be bypassed when processing certain malformed HTTP requests. This could permit unauthorized access to restricted API endpoints in environments that rely on REST-layer authorization. Transport-level authorization is not affected by this issue. ### Impact The default OpenSearch distribution is not affected by this issue. REST actions in the default distribution have corresponding transport actions that independently enforce authorization. Custom plugins that register REST actions without a corresponding transport action may be affected, potentially allowing unauthorized read access to those endpoints. ### Patches This issue is fixed in OpenSearch 2.19.0. Users should upgrade to 2.19.0 or later.
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) | 2.11.0.0 to before 2.19.0.0 | 2.19.0.0 | Patch available | GHSA-83x9-vc3c-hghc |
- org.opensearch.plugin:opensearch-security (Maven) Vendor— Affected 2.11.0.0 to before 2.19.0.0 Fixed in 2.19.0.0 Patch available GHSA-83x9-vc3c-hghc
Remediation
- Fix · GHSA-83x9-vc3c-hghc org.opensearch.plugin:opensearch-security (Maven) Fixed in 2.19.0.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-83x9-vc3c-hghc
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences