CVE-2026-77811
Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards
- State
- Published
- Severity
- 6.2 Medium
- Published
- Aug 21, 2026
- Updated
- Aug 27, 2026
- Reserved
- Aug 21, 2026
Description
Improper input validation in the dashboards-observability plugin in OpenSearch Dashboards allows a remote authenticated user with write permissions to OpenSearch Dashboards saved objects to execute arbitrary JavaScript in the context of other users' browser sessions by uploading a saved asset with arbitrary web content.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.2 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N | AMZN |
| 3.1 | 8.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N | AMZN |
Weaknesses
- CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
Affected Products
| Product | Versions |
|---|---|
Amazon OpenSearch ServiceAWS |
|
OpenSearch Dashboards dashboards-observability pluginOpenSearch |
|
References
- https://opensearch.org/artifacts/by-version/#release-3-4-0patch
- https://opensearch.org/artifacts/by-version/#release-2-19-6patch
- https://aws.amazon.com/security/security-bulletins/2026-088-aws/vendor-advisory
- https://github.com/opensearch-project/dashboards-observability/security/advisories/GHSA-rmqx-r3wm-3px5third-party-advisory
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