CVE-2026-71236— Grocy - Stored XSS via HTMLPurifier Output Double-Decode
Quick assessment
Affected
grocy grocy
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.
Grocy是Grocy组织开源的一款集文档管理与企业应用于一体的管理软件。 Grocy存在跨站脚本漏洞，该漏洞源于API请求体解析器对输入值先经HTMLPurifier净化，随后又手动反转HTML实体编码，导致双重解码，可能重新引入存储型跨站脚本漏洞，影响API可写入的产品、食谱、库存、用户、杂务等字段。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-71236
Vulnerability Information
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Vulnerability Title
Grocy - Stored XSS via HTMLPurifier Output Double-Decode
Source: CVE Program / CVE List V5
Vulnerability Description
Grocy's API request-body parser (controllers/Api/BaseApiController.php, GetParsedAndFilteredRequestBody) purifies incoming field values with HTMLPurifier, then manually reverses HTML-entity encoding of the resulting output by replacing &lt;, &gt;, and &amp; back to <, >, and & immediately after purification.
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
Vulnerability Title
Grocy 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grocy是Grocy组织开源的一款集文档管理与企业应用于一体的管理软件。 Grocy存在跨站脚本漏洞，该漏洞源于API请求体解析器对输入值先经HTMLPurifier净化，随后又手动反转HTML实体编码，导致双重解码，可能重新引入存储型跨站脚本漏洞，影响API可写入的产品、食谱、库存、用户、杂务等字段。
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)
Affected Products
II. Public POCs for CVE-2026-71236
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Qwen3.6-35B-A3B
· 6714 chars
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III. Intelligence Information for CVE-2026-71236
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Other References for CVE-2026-71236 (1)
IV. Related Vulnerabilities
Same vendor: grocy
Same weakness: CWE-79
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V. Comments for CVE-2026-71236
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