CVE-2025-48935
📋 TL;DR
This vulnerability allows attackers to bypass Deno's permission system for database read/write operations using the ATTACH DATABASE SQL statement. It affects Deno runtime users running versions 2.2.0 through 2.2.4. Attackers can potentially access or modify database files they shouldn't have permission to touch.
💻 Affected Systems
- Deno
📦 What is this software?
Deno by Deno
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including unauthorized data access, modification, or deletion across all database files accessible to the Deno process.
Likely Case
Unauthorized read access to sensitive database files containing application data, credentials, or configuration information.
If Mitigated
Limited impact if proper network segmentation and least privilege principles are followed, restricting database file access at OS level.
🎯 Exploit Status
Exploitation requires ability to execute arbitrary SQL statements in Deno's SQLite environment.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.5
Vendor Advisory: https://github.com/denoland/deno/security/advisories/GHSA-8vxj-4cph-c596
Restart Required: Yes
Instructions:
1. Update Deno using: deno upgrade --version 2.2.5
2. Restart all Deno processes
3. Verify version with: deno --version
🔧 Temporary Workarounds
Disable SQLite database functionality
allRemove or disable SQLite database operations in vulnerable applications
Restrict file system permissions
linuxUse OS-level permissions to restrict database file access
chmod 600 database_files/*
chown restricted_user:restricted_group database_files/
🧯 If You Can't Patch
- Implement strict input validation on all SQL statements
- Use external database services instead of Deno's built-in SQLite
🔍 How to Verify
Check if Vulnerable:
Check if Deno version is between 2.2.0 and 2.2.4 inclusiveCheck Version:
deno --versionVerify Fix Applied:
Confirm Deno version is 2.2.5 or higher📡 Detection & Monitoring
Log Indicators:
- ATTACH DATABASE statements in SQL logs
- Unexpected database file access patterns
Network Indicators:
- N/A - local file system vulnerability
SIEM Query:
search 'ATTACH DATABASE' in application logs