CVE-2026-0704
📋 TL;DR
This vulnerability in Octopus Deploy allows attackers to delete files or file contents on the host system through an unauthenticated API endpoint lacking input validation. It affects Octopus Deploy installations with exposed API endpoints, potentially enabling attackers to disrupt operations or delete critical configuration files.
💻 Affected Systems
- Octopus Deploy
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical system files, configuration files, or application binaries leading to service disruption, data loss, or privilege escalation.
Likely Case
Unauthorized deletion of application files, configuration files, or deployment artifacts causing service disruption, failed deployments, or loss of operational data.
If Mitigated
Limited impact with proper network segmentation and API endpoint restrictions, potentially only affecting non-critical files in isolated environments.
🎯 Exploit Status
The advisory suggests the vulnerability can be exploited without authentication through API calls. No public exploit code has been identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://advisories.octopus.com/post/2026/sa2026-01
Restart Required: Yes
Instructions:
1. Review the vendor advisory at https://advisories.octopus.com/post/2026/sa2026-01 2. Identify affected versions 3. Upgrade to the patched version specified in the advisory 4. Restart Octopus Deploy services 5. Verify the fix is applied
🔧 Temporary Workarounds
Restrict API Access
allImplement network-level restrictions to limit access to Octopus Deploy API endpoints
Use firewall rules to restrict access to Octopus Deploy API ports (default: 10933 for HTTP, 10943 for HTTPS)
Implement API Authentication
allEnsure all API endpoints require proper authentication
Configure Octopus Deploy to require API keys or other authentication for all endpoints
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Octopus Deploy from untrusted networks
- Monitor API access logs for suspicious file deletion attempts and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check Octopus Deploy version against affected versions listed in vendor advisory. Review API endpoint access controls and authentication requirements.Check Version:
Check Octopus Deploy web interface or configuration files for version informationVerify Fix Applied:
Verify upgraded to patched version from vendor advisory. Test that API endpoints properly validate input and require authentication for file operations.📡 Detection & Monitoring
Log Indicators:
- Unusual API calls to file deletion endpoints
- Multiple failed authentication attempts followed by successful file operations
- Unexpected file deletion events in system logs
Network Indicators:
- Unusual traffic patterns to Octopus Deploy API endpoints
- External IP addresses accessing internal API endpoints
SIEM Query:
source="octopus.log" AND ("DELETE" OR "remove" OR "file") AND response_code=200