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CVE-2026-2102— XSS in wrensec-commons CREST framework HTTP binding via _mimeType parameter

Quick assessment

Affected
Wren Security wrensec-commons
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.

wrensec-commons 组件在 CREST 框架的 HTTP 绑定中存在一个反射型跨站脚本（XSS）漏洞。HttpUtils.prepareResponse() 方法在设置响应头 Content-Type 时，直接使用了未经适当清理的 _mimeType 请求参数。攻击者可通过发送带有 _mimeType=text/html 参数的 GET 请求，诱导浏览器将 CREST 返回的 JSON 响应解析为 HTML，从而在受害者的浏览器中执行任意 JavaScript 代码。该漏洞可通过诱使用户访问针对任意已部

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-2102

Vulnerability Information
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Vulnerability Title
XSS in wrensec-commons CREST framework HTTP binding via _mimeType parameter
Source: CVE Program / CVE List V5
Vulnerability Description
wrensec-commons contains a reflected cross-site scripting (XSS) vulnerability in the CREST framework's HTTP binding. The HttpUtils.prepareResponse() method used the _mimeType request parameter to set the Content-Type response header without proper sanitization. By sending a GET request with _mimeType=text/html, an attacker could cause the browser to interpret a CREST JSON response as HTML, enabling execution of arbitrary JavaScript in the victim's browser. The vulnerability is exploitable by tricking a user into visiting a crafted URL targeting any deployed CREST endpoint. The issue is fixed in versions 22.6.2 and 23.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
Wren Security wrensec-commons 0 ~ 22.6.2 -

II. Public POCs for CVE-2026-2102

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III. Intelligence Information for CVE-2026-2102

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Other References for CVE-2026-2102 (3)

IV. Related Vulnerabilities

Same weakness: CWE-79