All Vulnerabilities Resolved
A comprehensive security audit was conducted from December 1-5, 2025. All identified vulnerabilities have been addressed in version 0.3.1. Users should update to the latest version.
Summary
During a routine security review, I identified and remediated 18 security vulnerabilities across the Go Memory Visualizer extension. These issues ranged from critical XSS vulnerabilities in webviews to low-severity configuration validation gaps. All issues have been fully resolved, and no exploitation has been observed in the wild.
Vulnerability Details
| ID | Severity | Category | Description | Status |
|---|---|---|---|---|
| VULN-001 | CRITICAL | XSS | DOM-based XSS in Workspace Analysis webview via unescaped struct names | Fixed |
| VULN-002 | CRITICAL | XSS | DOM-based XSS in Memory Layout panel via unescaped field content | Fixed |
| VULN-003 | CRITICAL | Encapsulation | Private member access via bracket notation bypassing TypeScript access control | Fixed |
| VULN-004 | HIGH | Injection | CSV formula injection in exported reports allowing code execution | Fixed |
| VULN-005 | HIGH | ReDoS | Regular expression denial of service in struct field parsing | Fixed |
| VULN-006 | HIGH | ReDoS | Regular expression denial of service in embedded field regex | Fixed |
| VULN-008 | HIGH | Performance | Synchronous file I/O blocking extension host | Fixed |
| VULN-010 | HIGH | DoS | Resource exhaustion via unbounded file processing in workspace analyzer | Fixed |
| VULN-011 | MEDIUM | CSP | Missing Content Security Policy in webview panels | Fixed |
| VULN-012 | MEDIUM | Info Disclosure | Detailed error messages exposing internal paths and state | Fixed |
| VULN-013 | MEDIUM | Permissions | Insecure file permissions (0o644) on exported files | Fixed |
| VULN-014 | MEDIUM | Integer Overflow | Integer overflow in array size calculation for large arrays | Fixed |
| VULN-015 | MEDIUM | Injection | Markdown injection in hover provider content | Fixed |
| VULN-016 | MEDIUM | Injection | Markdown injection in editor decoration messages | Fixed |
| VULN-017 | MEDIUM | Race Condition | Race condition in decoration updates causing UI corruption | Fixed |
| VULN-018 | MEDIUM | DoS | Unbounded recursion in circular struct reference resolution | Fixed |
| VULN-020 | MEDIUM | XSS | XSS in documentation site calculator via field names | Fixed |
| VULN-021 | LOW | Validation | Missing architecture configuration validation | Fixed |
Remediation Timeline
Recommended Actions
Update Immediately
All users should update to version 0.3.1 or later. In VS Code, go to Extensions, find Go Memory Visualizer, and click Update. Alternatively, run:
code --install-extension RhinoSoftware.go-memory-visualizerVerify Installation
Confirm you're running the patched version by checking the extension version in VS Code's Extensions panel. The version should be 0.3.1 or higher.
Review Exported Files
If you previously exported CSV reports, review them for any suspicious formulas beginning with =, +, -, or @ characters before opening in spreadsheet applications.
Technical Details
XSS Prevention: All user-controlled content (struct names, field names, type names) is now sanitized using dedicated escapeHtml() and escapeMarkdown() functions before rendering in webviews or hover content.
Content Security Policy: All webview panels now include strict CSP headers: default-src 'none'; style-src 'unsafe-inline', preventing script execution and external resource loading.
Resource Limits: Workspace analysis now enforces limits of 1,000 files maximum, 1MB per file, and 500 results to prevent resource exhaustion attacks.
Regex Hardening: Complex regex patterns with optional groups were replaced with simpler, bounded patterns that pre-process input to strip comments and tags before matching.
Report Security Issues
Found a security vulnerability? Please report it responsibly.
Open an Issue | Discord: 1rhino2