GHSA-83x9-vc3c-hghc
OpenSearch has a bypass of REST Layer Authorization Using Malformed Paths
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
What each source reports
GitHub Advisories Score used
OpenSearch has a bypass of REST Layer Authorization Using Malformed Paths
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.
- Record
GHSA-83x9-vc3c-hghc- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
OpenSearch has a bypass of REST Layer Authorization Using Malformed Paths
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.
- Record
GHSA-83x9-vc3c-hghc- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.opensearch.plugin:opensearch-securityMaven | 2.11.0.0 up to 2.19.0.0 | 2.19.0.0 |
org.opensearch.plugin:opensearch-securityMaven | 2.11.0.0 up to 2.19.0.0, plus listed versions 2.11.1.02.12.0.02.13.0.02.14.0.02.15.0.0 Show 4 moreShow less2.16.0.02.17.0.02.17.1.02.18.0.0 | 2.19.0.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-83x9-vc3c-hghc is a low vulnerability (CVSS 3.7) in org.opensearch.plugin:opensearch-security, published May 7, 2026. No source lists public exploit code. Fixed in org.opensearch.plugin:opensearch-security 2.19.0.0.