CVE-2026-48541 Overview
CVE-2026-48541 is a stored client-side template injection vulnerability in Krayin CRM through version 2.2.6. Authenticated attackers can inject Vue.js template expressions into the person name field. The injected expressions reach the Vue template compiler and execute arbitrary JavaScript in the browser of any user viewing the affected person record. The flaw is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation).
Critical Impact
Attackers with low-privilege accounts can execute arbitrary JavaScript in the application origin for every user who views a poisoned person record, enabling session theft, CRM data exfiltration, and unauthorized actions on behalf of victims.
Affected Products
- Krayin CRM versions through 2.2.6
- Deployments exposing the person/contact management module
- Instances where Vue.js client-side template compilation is active
Discovery Timeline
- 2026-09-24 - CVE-2026-48541 published to NVD
- 2026-09-30 - Last updated in NVD database
Technical Details for CVE-2026-48541
Vulnerability Analysis
The vulnerability is a stored client-side template injection in the person name field of Krayin CRM. User-supplied input is rendered within a context where Vue.js performs runtime template compilation. Double-brace syntax such as {{ expression }} is interpreted as a Vue template expression rather than as inert text. An authenticated attacker can store a payload once and trigger execution for every subsequent viewer of that record.
Because the payload executes in the same origin as the CRM, it inherits full access to the victim's session, cookies accessible to JavaScript, and the Krayin REST interface. Attackers can read customer data, modify records, create new administrative users if the viewer holds sufficient privileges, or pivot to additional application attacks.
Root Cause
Krayin CRM fails to neutralize template delimiters in attacker-controlled strings before passing them to the Vue runtime compiler. Rather than treating the person name as a literal data value, the application renders it inside a region evaluated by Vue, which parses the double-brace syntax as a reactive expression. The absence of either output escaping or use of the Vue runtime-only build (which disables in-browser template compilation) is the underlying defect.
Attack Vector
Exploitation requires an authenticated account with permission to create or edit person records. The attacker submits a person name containing double-brace template syntax. Vue traverses the prototype chain to reach the Function constructor and compiles the attacker-supplied expression into executable JavaScript. The payload executes in each victim's browser upon viewing the record, requiring only passive user interaction. Technical write-ups are available in the GitHub CVE-2026-48541 disclosure and the VulnCheck advisory.
No verified public exploit code is referenced in the enriched advisory data; the vulnerability is described in prose only.
Detection Methods for CVE-2026-48541
Indicators of Compromise
- Person or contact records whose name field contains double-brace sequences such as {{ and }} or references to constructor, Function, or prototype.
- Browser console errors from the Vue template compiler when rendering person listings or detail views.
- Outbound HTTP requests from analyst browsers to unexpected domains immediately after viewing a CRM record.
- Unexpected creation of users, API tokens, or exports performed under the identity of personnel who recently opened a specific person record.
Detection Strategies
- Scan the Krayin CRM database for person.name values containing template delimiters or JavaScript identifiers associated with prototype traversal.
- Deploy a Content Security Policy report-only header and monitor for violations originating from the CRM origin.
- Review web server access logs for POST and PUT requests to person endpoints with payload bodies containing {{ sequences.
Monitoring Recommendations
- Alert on anomalous administrative API calls that follow a user viewing a person detail page.
- Correlate browser telemetry with CRM audit logs to identify viewers of a suspected poisoned record.
- Track creation and modification events on person records by low-privilege accounts for later triage.
How to Mitigate CVE-2026-48541
Immediate Actions Required
- Audit all person records and quarantine entries whose name field contains {{, }}, constructor, or similar template-injection markers.
- Restrict person creation and edit permissions to trusted roles until a fixed version is deployed.
- Reset session tokens and rotate API keys for users who viewed suspicious records during the exposure window.
Patch Information
The enriched advisory data does not list a fixed version at the time of publication. Monitor the VulnCheck Krayin CRM advisory and the Krayin project release notes for an official patched release addressing versions beyond 2.2.6.
Workarounds
- Apply server-side input validation that rejects or strips {{ and }} sequences from the person name field before persistence.
- Switch the frontend build to the Vue runtime-only distribution so client-side templates are no longer compiled from arbitrary data.
- Introduce a strict Content Security Policy that disallows unsafe-eval, blocking the Function constructor path used by this template injection.
- Limit the create and edit person privileges to a minimal set of vetted accounts to reduce the attacker surface.
# Example CSP header to block eval-based template execution
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
