CVE-2026-77811

Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards

Published: Aug 21, 2026Updated: Aug 27, 2026 Sources: CVE List NVDCWE-79

8.7HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:RUser Interaction

Required

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-79

Affected Products

AWS

commercial·US

Amazon OpenSearch ServiceMixed

Cloud & SaaS / cloud-platform

OpenSearch

oss-project·US

OpenSearch Dashboards dashboards-observability pluginOn-prem

Databases / db-tooling

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://opensearch.org/artifacts/by-version/#release-3-4-0

opensearch.org

https://opensearch.org/artifacts/by-version/#release-2-19-6

opensearch.org

https://aws.amazon.com/security/security-bulletins/2026-088-aws/

aws.amazon.com

and 1 more references View all →

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