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CVE-2026-46511— HAXcms: Mass Token Exfiltration and Cross-Tenant Hijack

Quick assessment

Affected
haxtheweb haxcms-nodejs
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.

HAX是HAX The Web开源的一个HAX+CMS使用PHP后端管理的微型网站。 HAX CMS PHP 26.0.0之前版本存在安全漏洞，该漏洞源于存储型XSS与/system/api/connectionSettings端点动态令牌暴露结合，可能导致经过身份验证的攻击者实现完全跨租户账户接管。

AI Predicted 9.8 Difficulty: Easy EPSS 0.48% · P41

Affected Version Matrix 2

VendorProduct Version RangeStatus
haxtheweb haxcms-nodejs < 26.0.0 affected
haxtheweb haxcms-php < 26.0.0 affected
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I. Basic Information for CVE-2026-46511

Vulnerability Information
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Vulnerability Title
HAXcms: Mass Token Exfiltration and Cross-Tenant Hijack
Source: CVE Program / CVE List V5
Vulnerability Description
HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, an attack chain utilizing Stored XSS alongside dynamic token exposure in the `/system/api/connectionSettings` endpoint allows an authenticated attacker to perform a complete cross-tenant account takeover. The API dynamically leaks the active session's authentication tokens (including the `jwt`, `user_token`, `site_token`, and `appstore_token`) into a global JavaScript variable (`window.appSettings`). An attacker can exploit the XSS vulnerability to force a victim's browser to silently fetch their specific connection settings, extract the tokens, and exfiltrate them to an attacker-controlled webhook. Version 26.0.0 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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
HAX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HAX是HAX The Web开源的一个HAX+CMS使用PHP后端管理的微型网站。 HAX CMS PHP 26.0.0之前版本存在安全漏洞，该漏洞源于存储型XSS与/system/api/connectionSettings端点动态令牌暴露结合，可能导致经过身份验证的攻击者实现完全跨租户账户接管。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
haxtheweb haxcms-nodejs < 26.0.0 -
haxtheweb haxcms-php < 26.0.0 -

II. Public POCs for CVE-2026-46511

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III. Intelligence Information for CVE-2026-46511

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Vendor Advisories for CVE-2026-46511 (1)

Same Patch Batch · haxtheweb · 2026-06-05 · 16 CVEs total

CVE-2026-46392 8.7 HIGH HAX CMS PHP Has a Stored XSS via Case-Sensitivity Mismatch in HTML Upload Validation
CVE-2026-46493 7.5 HIGH haxtheweb/haxcms-php uses insecure method for generating salt
CVE-2026-46357 6.5 MEDIUM HAX CMS NodeJS application Vulnerable to Denial of Service using Malicious Import Request
CVE-2026-46397 6.5 MEDIUM haxcms-php Local File Inclusion via saveOutline API Location Parameter v2.0
CVE-2026-46396 HAX CMS has a stored XSS via <iframe> that allows access to sensitive client-side data and
CVE-2026-46401 HAX CMS PHP has Insufficient Session Expiration
CVE-2026-46390 HAX CMS has Unauthenticated Git Access via User-Controlled Key
CVE-2026-46394 HAX CMS Vulnerable to Command Injection using Git.php
CVE-2026-46496 HAX CMS: Stored XSS via '<video-player>' component allows arbitrary JavaScript execution a
CVE-2026-46398 HAX CMS Missing Secure Flag on Cookie
CVE-2026-46395 HAX CMS Vulnerable to Private Key Disclosure via Broken HMAC Implementation
CVE-2026-46400 HAXCMS PHP has a File Upload Validation Bypass
CVE-2026-46391 HAX open-apis: Credential Theft via Server-Side Request Forgery (SSRF) in open-apis
CVE-2026-46393 HAXcms createSite SSRF Enables Arbitrary File Read
CVE-2026-46399 Authenticated Remote Code Execution via File Overwrite

IV. Related Vulnerabilities

Same product: haxcms-nodejs
Same vendor: haxtheweb
Same weakness: CWE-79

V. Comments for CVE-2026-46511

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