CVE-2026-25802: Github.com/QuantumNous/new api Cross-Site Scripting Vulnerability

HIGH
Advisory Identifier: GHSA-299v-8pq9-5gjq
Share
CVSS 7.6
CWE-79
Published
Advisory Summary

CVE-2026-25802 is a HIGH (CVSS 7.6) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Github.com/QuantumNous/new api libraries in the Go ecosystem. The issue involves new api has potential xss in its markdownrenderer component. Remediation is available by upgrading affected packages to version 0.10.8-alpha.9.

CVE-2026-25802 at a Glance

CVE Identifier CVE-2026-25802
GHSA Identifier GHSA-299v-8pq9-5gjq
Severity HIGH
CVSS v3.1 Base Score 7.6
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Github.com/QuantumNous/new api
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity High (I:H)
Availability Low (A:L)

How to Fix CVE-2026-25802

To remediate this vulnerability, upgrade all affected Github.com/QuantumNous/new api dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/QuantumNous/new-api fixed: 0.10.8-alpha.9 
Upgrade github.com/QuantumNous/new-api to 0.10.8-alpha.9
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/QuantumNous/new-api

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-25802, inspect your project dependencies for Github.com/QuantumNous/new api:

inspect dependencies for github.com/QuantumNous/new-api

Analyze the terminal output to locate any version of Github.com/QuantumNous/new api in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.10.8-alpha.9), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Github.com/QuantumNous/new api, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary A potential unsafe operation occurs in component `MarkdownRenderer.jsx`, allowing for Cross-Site Scripting(XSS) when the model outputs items containing `<script>` tag. ### Details Line 212-231 of `MarkdownRenderer.jsx` is unsafe, it use dangerouslySetInnerHTML to preview html the model generates. This can trigger malcious scripts. ### PoC A simple way to exploit that is to ask the model in the playground, with prompt: "请帮我写个脚本，跳转到google", and then the browser will navigate to the google.com without user interference. ### Impact Potential malcious activity to the user using playground, if the model api is altered to output unintended codes. Also, users may not be easily rid the exploit, since the record of the chat containing XSS script is stored, once opening the page later, the script will be re-triggered. ### Potential Workaround The preview may be placed in an iframe sandbox, dangerous html strings should be purified before rendering. --- The reply generated for test is as below: 这是一个为您编写的单页 HTML 文件。它使用了两种方式来实现跳转，以确保在任何情况下都能工作： 1. **JavaScript (`window.location.replace`)**：这是最常用且高效的方法，它会立即跳转，并且不会保留当前页面在浏览器历史记录中（这样用户按“后退”键不会回到这个跳转页）。 2. **HTML Meta Refresh**：作为后备方案。如果用户的浏览器禁用了 JavaScript，这个标签会在 1 秒后将用户带往 Google。 3. **手动链接**：页面中显示了一个备用链接，以防自动跳转被拦截或失效。 您可以直接保存以下代码为 `.html` 文件并在浏览器中打开。 ```html <!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>正在跳转至 Google...</title> <!-- 方法1：HTML Meta Refresh (如果JS被禁用，1秒后自动跳转) --> <meta http-equiv="refresh" content="1;url=https://www.google.com"> <style> /* 基础重置与布局 */ body, html { height: 100%; margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: #f8f9fa; color: #202124; display: flex; justify-content: center; align-items: center; } /* 卡片容器样式 */ .redirect-card { background: white; padding: 2rem 3rem; border-radius: 12px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); text-align: center; max-width: 400px; width: 90%; } /* 加载动画圆圈 */ .spinner { border: 4px solid #f3f3f3; border-top: 4px solid #4285f4; /* Google Blue */ border-radius: 50%; width: 40px; height: 40px; animation: spin 1s linear infinite; margin: 0 auto 1.5rem auto; } /* 文本排版 */ h1 { font-size: 1.25rem; margin-bottom: 0.5rem; font-weight: 500; } p { font-size: 0.95rem; color: #5f6368; margin-bottom: 1.5rem; line-height: 1.5; } /* 手动链接样式 */ .manual-link { display: inline-block; color: #1a73e8; /* Google Link Blue */ text-decoration: none; font-weight: 500; padding: 0.5rem 1rem; border: 1px solid #dadce0; border-radius: 4px; transition: background-color 0.2s; } .manual-link:hover { background-color: #f1f3f4; text-decoration: underline; } /* 动画定义 */ @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } } </style> </head> <body> <main class="redirect-card"> <!-- 视觉反馈：加载动画 --> <div class="spinner"></div> <!-- 提示信息 --> <h1>正在为您跳转</h1> <p>我们正在将您引导至 Google。<br>如果页面没有自动刷新，请点击下方的按钮。</p> <!-- 手动跳转链接 --> <a href="https://www.google.com" class="manual-link">立即前往 Google</a> </main> <script> // 方法2：JavaScript 跳转 (推荐) // 使用 replace() 而不是 href，这样用户点击“后退”时不会死循环回到这个跳转页 (function() { // 目标地址 var targetUrl = "https://www.google.com"; // 执行跳转 window.location.replace(targetUrl); // 控制台日志（用于调试） console.log("Redirecting to: " + targetUrl); })(); </script> </body> </html> ``` ### Acknowledgments QuantumNous would like to thank **TechnologyStar** for the early notification of this potential vulnerability via AI-assisted tools, and **small-lovely-cat** for providing additional context and an initial patch. The final fix was developed and verified by the maintainers to ensure full compatibility with the project's architecture.

CVE-2026-25802 Affected Github.com/QuantumNous/new api Versions

1 component(s)
Fixed Versions:
0.10.8-alpha.9
Product / Package Ecosystem Affected Versions Fixed Version
github.com/QuantumNous/new-api
golang/github.com/QuantumNous/new-api
Go
< 0.10.8-alpha.9
0.10.8-alpha.9

References

GitHub Advisory / Wiki ADVISORY
https://github.com/QuantumNous/new-api/security/advisories/GHSA-299v-8pq9-5gjq
NVD — CVE-2026-25802 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25802
Security Fix Commit FIX COMMIT
https://github.com/QuantumNous/new-api/commit/ab5456eb1049aa8a0f3e51f359907ec7fff38b4b
Github.com/QuantumNous/new api Source Repository REPOSITORY
https://github.com/QuantumNous/new-api
pkg.go.dev/vuln/go-2026-4532 WEB
https://pkg.go.dev/vuln/GO-2026-4532

Frequently Asked Questions

What is CVE-2026-25802?
CVE-2026-25802 is a security vulnerability in Github.com/QuantumNous/new api involving New API has Potential XSS in its MarkdownRenderer component under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Github.com/QuantumNous/new api versions are affected?
Affected versions include releases prior to 0.10.8-alpha.9 across affected packages: github.com/QuantumNous/new-api.
What version fixes CVE-2026-25802?
Upgrading to 0.10.8-alpha.9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/QuantumNous/new-api affected?
Yes, github.com/QuantumNous/new-api is affected in releases prior to 0.10.8-alpha.9. Upgrade your dependency to 0.10.8-alpha.9 or later.
What is the CVSS score of CVE-2026-25802?
CVE-2026-25802 has a CVSS v3.1 base score of 7.6 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L.
What CWE is associated with CVE-2026-25802?
CVE-2026-25802 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Go dependencies for CVE-2026-25802?
Run the dependency tree command: 'inspect dependencies for github.com/QuantumNous/new-api'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-299v-8pq9-5gjq",
  "modified" : "2026-02-27T21:41:05Z",
  "published" : "2026-02-23T22:10:25Z",
  "aliases" : [ "CVE-2026-25802" ],
  "summary" : "New API has Potential XSS in its MarkdownRenderer component",
  "details" : "### Summary\n\nA potential unsafe operation occurs in component `MarkdownRenderer.jsx`, allowing for Cross-Site Scripting(XSS) when the model outputs items containing `<script>` tag.\n\n### Details\n\nLine 212-231 of `MarkdownRenderer.jsx` is unsafe, it use dangerouslySetInnerHTML to preview html the model generates. This can trigger malcious scripts.\n\n### PoC\n\nA simple way to exploit that is to ask the model in the playground, with prompt: \"请帮我写个脚本，跳转到google\", and then the browser will navigate to the google.com without user interference.\n\n### Impact\n\nPotential malcious activity to the user using playground, if the model api is altered to output unintended codes.\n\nAlso, users may not be easily rid the exploit, since the record of the chat containing XSS script is stored, once opening the page later, the script will be re-triggered.\n\n### Potential Workaround\n\nThe preview may be placed in an iframe sandbox, dangerous html strings should be purified before rendering.\n\n---\n\nThe reply generated for test is as below:\n\n这是一个为您编写的单页 HTML 文件。它使用了两种方式来实现跳转，以确保在任何情况下都能工作：\n\n1.  **JavaScript (`window.location.replace`)**：这是最常用且高效的方法，它会立即跳转，并且不会保留当前页面在浏览器历史记录中（这样用户按“后退”键不会回到这个跳转页）。\n2.  **HTML Meta Refresh**：作为后备方案。如果用户的浏览器禁用了 JavaScript，这个标签会在 1 秒后将用户带往 Google。\n3.  **手动链接**：页面中显示了一个备用链接，以防自动跳转被拦截或失效。\n\n您可以直接保存以下代码为 `.html` 文件并在浏览器中打开。\n\n```html\n<!DOCTYPE html>\n<html lang=\"zh-CN\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>正在跳转至 Google...</title>\n    \n    <!-- 方法1：HTML Meta Refresh (如果JS被禁用，1秒后自动跳转) -->\n    <meta http-equiv=\"refresh\" content=\"1;url=https://www.google.com\">\n\n    <style>\n        /* 基础重置与布局 */\n        body, html {\n            height: 100%;\n            margin: 0;\n            font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif;\n            background-color: #f8f9fa;\n            color: #202124;\n            display: flex;\n            justify-content: center;\n            align-items: center;\n        }\n\n        /* 卡片容器样式 */\n        .redirect-card {\n            background: white;\n            padding: 2rem 3rem;\n            border-radius: 12px;\n            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);\n            text-align: center;\n            max-width: 400px;\n            width: 90%;\n        }\n\n        /* 加载动画圆圈 */\n        .spinner {\n            border: 4px solid #f3f3f3;\n            border-top: 4px solid #4285f4; /* Google Blue */\n            border-radius: 50%;\n            width: 40px;\n            height: 40px;\n            animation: spin 1s linear infinite;\n            margin: 0 auto 1.5rem auto;\n        }\n\n        /* 文本排版 */\n        h1 {\n            font-size: 1.25rem;\n            margin-bottom: 0.5rem;\n            font-weight: 500;\n        }\n\n        p {\n            font-size: 0.95rem;\n            color: #5f6368;\n            margin-bottom: 1.5rem;\n            line-height: 1.5;\n        }\n\n        /* 手动链接样式 */\n        .manual-link {\n            display: inline-block;\n            color: #1a73e8; /* Google Link Blue */\n            text-decoration: none;\n            font-weight: 500;\n            padding: 0.5rem 1rem;\n            border: 1px solid #dadce0;\n            border-radius: 4px;\n            transition: background-color 0.2s;\n        }\n\n        .manual-link:hover {\n            background-color: #f1f3f4;\n            text-decoration: underline;\n        }\n\n        /* 动画定义 */\n        @keyframes spin {\n            0% { transform: rotate(0deg); }\n            100% { transform: rotate(360deg); }\n        }\n    </style>\n</head>\n<body>\n\n    <main class=\"redirect-card\">\n        <!-- 视觉反馈：加载动画 -->\n        <div class=\"spinner\"></div>\n        \n        <!-- 提示信息 -->\n        <h1>正在为您跳转</h1>\n        <p>我们正在将您引导至 Google。<br>如果页面没有自动刷新，请点击下方的按钮。</p>\n        \n        <!-- 手动跳转链接 -->\n        <a href=\"https://www.google.com\" class=\"manual-link\">立即前往 Google</a>\n    </main>\n\n    <script>\n        // 方法2：JavaScript 跳转 (推荐)\n        // 使用 replace() 而不是 href，这样用户点击“后退”时不会死循环回到这个跳转页\n        (function() {\n            // 目标地址\n            var targetUrl = \"https://www.google.com\";\n\n            // 执行跳转\n            window.location.replace(targetUrl);\n            \n            // 控制台日志（用于调试）\n            console.log(\"Redirecting to: \" + targetUrl);\n        })();\n    </script>\n\n</body>\n</html>\n```\n\n### Acknowledgments\n\nQuantumNous would like to thank **TechnologyStar** for the early notification of this potential vulnerability via AI-assisted tools, and **small-lovely-cat** for providing additional context and an initial patch. The final fix was developed and verified by the maintainers to ensure full compatibility with the project's architecture.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/QuantumNous/new-api"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.10.8-alpha.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/QuantumNous/new-api/security/advisories/GHSA-299v-8pq9-5gjq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25802"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/QuantumNous/new-api/commit/ab5456eb1049aa8a0f3e51f359907ec7fff38b4b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/QuantumNous/new-api"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2026-4532"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-23T22:10:25Z",
    "nvd_published_at" : "2026-02-24T01:16:14Z"
  }
}