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CVE-2026-77811— Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards

Quick assessment

Affected
AWS Amazon OpenSearch Service
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenSearch Dashboards 中的 dashboards-observability 插件存在输入验证不当的问题。远程经过身份验证且拥有 OpenSearch Dashboards 已保存对象写入权限的用户，可以通过上传包含任意 Web 内容的已保存资源，在其他用户浏览器会话上下文中执行任意 JavaScript 代码。

CVSS 8.7 · High EPSS 0.37% · P30

Affected Version Matrix 3

VendorProduct Version RangeStatus
AWS Amazon OpenSearch Service < 3.3 unaffected
OpenSearch OpenSearch Dashboards dashboards-observability plugin < 3.4 affected
< 2.19.6 affected
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I. Basic Information for CVE-2026-77811

Vulnerability Information
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Vulnerability Title
Stored Cross-Site Scripting via Integration Template Asset in OpenSearch Dashboards
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS Amazon OpenSearch Service - -
OpenSearch OpenSearch Dashboards dashboards-observability plugin 0 ~ 3.4 -

II. Public POCs for CVE-2026-77811

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7945 chars
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III. Intelligence Information for CVE-2026-77811

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Vendor Advisories for CVE-2026-77811 (2)

Other References for CVE-2026-77811 (2)

IV. Related Vulnerabilities

Same product: Amazon OpenSearch Service
Same vendor: AWS
Same weakness: CWE-79

V. Comments for CVE-2026-77811

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