Cross-Site Scripting (XSS) in @haxtheweb/haxcms-nodejs (CVE-2026-46396)
Summary
Cross-site scripting in @haxtheweb/haxcms-nodejs (CVE-2026-46396). Risk of unauthorized operations or information disclosure. Exploitable via src. Mitigation: upgrade to 26.0.0 or later.
Original description
The description as published by the source.
Summary
A stored cross-site scripting (XSS) vulnerability exists in HAX CMS due to improper sanitization of `` elements.
The application allows javascript: URIs in the src attribute, which are executed when a malicious page is viewed. This enables attackers to execute arbitrary JavaScript in the context of the victim’s browser and access sensitive data exposed to client-side scripts.
Details
Successful exploitation allows access to any data available in the browser context, including:
- Authentication tokens (e.g., JWT)
- Session cookies (if not protected with HttpOnly)
- Application configuration (e.g., window.appSettings)
- User-specific data accessible via APIs
This significantly increases the impact beyond simple script execution.
PoC
Steps to reproduce:
- Log in to HAX CMS as any authenticated user.
- Create a new page or edit an existing page.
- Open the HTML source editor (
<>). - Insert the following payload:
Impact
This vulnerability allows stored XSS leading to:
- Execution of arbitrary JavaScript in victim browsers
- Access to sensitive client-side data, including authentication tokens and session identifiers
- Unauthorized API actions performed on behalf of the victim
- Session hijacking and full account takeover
Because the application exposes authentication data in the client-side environment, exploitation of this vulnerability can lead to complete compromise of user accounts and site content.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-46396 has been found in @haxtheweb/haxcms-nodejs.
Attackers can target a specific entry point like src over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade @haxtheweb/haxcms-nodejs to 26.0.0 or later.
If unsure, ask your IT team or search "@haxtheweb/haxcms-nodejs CVE-2026-46396" on the vendor's site.
CVE-2026-46396 (@haxtheweb/haxcms-nodejs) — CWE-79
Attack surface: src
Patched: 26.0.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in @haxtheweb/haxcms-nodejs. Attackers reach the vulnerable code path via src.
Check the vendor advisory for the affected versions of @haxtheweb/haxcms-nodejs. Attack surface: src.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 26.0.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r '@haxtheweb/haxcms-nodejs' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r '@haxtheweb/haxcms-nodejs' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
@haxtheweb/haxcms-nodejsを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade @haxtheweb/haxcms-nodejs to 26.0.0ステージング環境で 26.0.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com