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CVE-2026-34417— OSCAL-GUI Reflected XSS via project parameter in oscal-forms.php

Quick assessment

Affected
brian-ruf OSCAL-GUI
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.

OSCAL-GUI是OSCAL公司的一个用于创建、编辑、查看和管理OSCAL合规数据模型的图形化界面工具。 OSCAL-GUI存在跨站脚本漏洞，该漏洞源于oscal-forms.php中project请求参数值在oscal-functions.php中未清理，当提供的项目ID未找到时，未清理值被连接进错误消息并反射到HTML响应体中，可能导致未经身份验证的攻击者利用反射型跨站脚本漏洞执行任意JavaScript。

CVSS 6.1 · Medium EPSS 0.17% · P7

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
brian-ruf OSCAL-GUI ≤ c989c4bd5a68f2621a81654e9250246539a28d5a affected
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I. Basic Information for CVE-2026-34417

Vulnerability Information
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Vulnerability Title
OSCAL-GUI Reflected XSS via project parameter in oscal-forms.php
Source: CVE Program / CVE List V5
Vulnerability Description
OSCAL-GUI contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser by injecting malicious content through the project request parameter in oscal-forms.php. The parameter value is URL-decoded and assigned to the project_id variable without sanitization in oscal-functions.php, and when the supplied project ID is not found, the unsanitized value is concatenated into an error message via the Messages() function and reflected into the HTML response body without encoding.
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
Vulnerability Title
OSCAL-GUI 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OSCAL-GUI是OSCAL公司的一个用于创建、编辑、查看和管理OSCAL合规数据模型的图形化界面工具。 OSCAL-GUI存在跨站脚本漏洞，该漏洞源于oscal-forms.php中project请求参数值在oscal-functions.php中未清理，当提供的项目ID未找到时，未清理值被连接进错误消息并反射到HTML响应体中，可能导致未经身份验证的攻击者利用反射型跨站脚本漏洞执行任意JavaScript。
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

Vendor Product Affected Versions CPE Subscribe
brian-ruf OSCAL-GUI 0 ~ c989c4bd5a68f2621a81654e9250246539a28d5a -

II. Public POCs for CVE-2026-34417

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III. Intelligence Information for CVE-2026-34417

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Vendor Advisories for CVE-2026-34417 (1)

Other References for CVE-2026-34417 (1)

IV. Related Vulnerabilities

Same product: OSCAL-GUI
Same vendor: brian-ruf
Same weakness: CWE-79

V. Comments for CVE-2026-34417

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