CVE-2026-0972 Overview
An HTML injection vulnerability exists in system generated emails in Fortra's GoAnywhere Managed File Transfer (MFT) prior to version 7.10.0. This vulnerability allows authenticated attackers to inject arbitrary HTML content into emails generated by the system, potentially leading to phishing attacks, credential theft, or manipulation of email content displayed to recipients.
Critical Impact
Authenticated attackers can inject malicious HTML content into system-generated emails, potentially enabling phishing campaigns or social engineering attacks against email recipients.
Affected Products
- Fortra GoAnywhere Managed File Transfer versions prior to 7.10.0
Discovery Timeline
- April 21, 2026 - CVE-2026-0972 published to NVD
- April 23, 2026 - Last updated in NVD database
Technical Details for CVE-2026-0972
Vulnerability Analysis
This vulnerability falls under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as injection vulnerabilities. The flaw resides in the email generation functionality of GoAnywhere MFT, where user-supplied input is not properly sanitized before being incorporated into system-generated emails.
The attack requires network access and an authenticated user account with low privileges. However, it also requires user interaction from the email recipient to be fully exploited. Due to the changed scope characteristic of this vulnerability, successful exploitation can impact resources beyond the vulnerable component itself—specifically, the email recipients who view the injected content.
Root Cause
The root cause of this vulnerability is improper input validation and output encoding in the email generation subsystem of GoAnywhere MFT. When the application constructs system-generated emails, it fails to properly sanitize user-controllable input, allowing HTML tags and potentially JavaScript to be injected into the email body. This lack of proper encoding or sanitization enables attackers to craft malicious payloads that are rendered by email clients.
Attack Vector
The attack is conducted over the network and requires the attacker to have valid credentials with low-level privileges on the GoAnywhere MFT system. The attacker identifies input fields or parameters that are reflected in system-generated emails, then injects HTML content such as fake login forms, malicious links, or embedded content designed to deceive email recipients.
The injected HTML is rendered when recipients view the email in their email client, potentially exposing them to phishing attacks or credential harvesting attempts. The changed scope means the impact extends beyond the MFT system itself to affect email recipients who may not have any direct relationship with the vulnerable application.
Detection Methods for CVE-2026-0972
Indicators of Compromise
- Unusual HTML tags or structures appearing in system-generated emails from GoAnywhere MFT
- User reports of suspicious content in emails originating from the MFT platform
- Log entries showing injection attempts with HTML special characters in form fields
- Email headers containing unexpected formatting or embedded elements
Detection Strategies
- Monitor GoAnywhere MFT application logs for suspicious input patterns containing HTML tags such as <script>, <form>, <iframe>, or encoded equivalents
- Implement email gateway rules to flag system-generated emails containing unexpected HTML structures
- Review audit logs for authenticated users submitting unusual content to fields that are reflected in email notifications
- Deploy content security policies to detect anomalous email formatting
Monitoring Recommendations
- Enable verbose logging on GoAnywhere MFT to capture all user input submitted to email-related functions
- Configure email security solutions to scan and analyze emails generated by the MFT platform for injection patterns
- Establish baseline behavior for system-generated emails and alert on deviations
- Implement user reporting mechanisms for suspicious emails and train users to identify potential phishing attempts
How to Mitigate CVE-2026-0972
Immediate Actions Required
- Upgrade Fortra GoAnywhere Managed File Transfer to version 7.10.0 or later immediately
- Review system-generated emails for any signs of HTML injection or manipulation
- Audit user accounts with access to features that generate system emails
- Notify email recipients to be cautious of unexpected content in emails from the MFT system
Patch Information
Fortra has addressed this vulnerability in GoAnywhere MFT version 7.10.0. Organizations should upgrade to this version or later to remediate the vulnerability. For detailed patch information, refer to the Fortra Security Advisory FI-2026-006.
Workarounds
- Implement additional input validation at the application layer to strip or encode HTML characters from user input before email generation
- Configure email gateways to sanitize HTML content in emails originating from the GoAnywhere MFT system
- Restrict access to features that generate system emails to only trusted, essential users
- Enable email client security features that disable automatic rendering of HTML content in emails from untrusted sources
# Example: Review GoAnywhere MFT version to verify patch status
# Check current version in GoAnywhere Admin Console
# Navigate to: Help > About GoAnywhere MFT
# Verify version is 7.10.0 or higher
# Monitor logs for potential injection attempts
grep -iE "<script|<form|<iframe|%3C|%3E" /path/to/goanywhere/logs/audit.log
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
