CVE-2026-77811
Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | aws |
| Product | amazon opensearch service |
| Published | Aug 21, 2026 |
| Last Updated | Aug 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
AWS / Amazon OpenSearch Service
All versions affected OpenSearch / OpenSearch Dashboards dashboards-observability plugin
0 < 3.4 0 < 2.19.6
References
opensearch.org: https://opensearch.org/artifacts/by-version/#release-3-4-0 opensearch.org: https://opensearch.org/artifacts/by-version/#release-2-19-6 aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-088-aws/ github.com: https://github.com/opensearch-project/dashboards-observability/security/advisories/GHSA-rmqx-r3wm-3px5