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CVE-2026-30862— Critical Stored XSS & Privilege Escalation in Appsmith

Quick assessment

Affected
appsmithorg appsmith
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Appsmith是Appsmith开源的一个用于构建、部署和维护内部应用程序的开源平台。 Appsmith 1.96之前版本存在安全漏洞，该漏洞源于Table Widget渲染管道中缺少HTML清理，可能导致存储型跨站脚本攻击，进而引发账户接管。

CVSS 9.1 · Critical EPSS 0.46% · P39
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I. Basic Information for CVE-2026-30862

Vulnerability Information
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Vulnerability Title
Critical Stored XSS & Privilege Escalation in Appsmith
Source: CVE Program / CVE List V5
Vulnerability Description
Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 1.96, a Critical Stored XSS vulnerability exists in the Table Widget (TableWidgetV2). The root cause is a lack of HTML sanitization in the React component rendering pipeline, allowing malicious attributes to be interpolated into the DOM. By leveraging the "Invite Users" feature, an attacker with a regular user account (user@gmail.com) can force a System Administrator to execute a high-privileged API call (/api/v1/admin/env), resulting in a Full Administrative Account Takeover. This vulnerability is fixed in 1.96.
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:H
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
Vulnerability Title
Appsmith 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Appsmith是Appsmith开源的一个用于构建、部署和维护内部应用程序的开源平台。 Appsmith 1.96之前版本存在安全漏洞，该漏洞源于Table Widget渲染管道中缺少HTML清理，可能导致存储型跨站脚本攻击，进而引发账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
appsmithorg appsmith < 1.96 -

II. Public POCs for CVE-2026-30862

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III. Intelligence Information for CVE-2026-30862

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Vendor Advisories for CVE-2026-30862 (1)

IV. Related Vulnerabilities

Same product: appsmith
Same vendor: appsmithorg
Same weakness: CWE-79