CVE-2026-27194
📋 TL;DR
CVE-2026-27194 is a remote code execution vulnerability in D-Tale's /save-column-filter endpoint that allows attackers to execute arbitrary code on vulnerable servers. This affects users who publicly expose D-Tale instances. The vulnerability stems from improper input validation (CWE-74) in pandas data structure visualization.
💻 Affected Systems
- D-Tale
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing data theft, lateral movement, ransomware deployment, and persistent backdoor installation.
Likely Case
Unauthorized data access, system manipulation, and potential credential harvesting from the compromised server.
If Mitigated
Limited impact with proper network segmentation and minimal exposed attack surface.
🎯 Exploit Status
Exploitation requires network access to the vulnerable endpoint. No authentication is required for the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.20.0
Vendor Advisory: https://github.com/man-group/dtale/security/advisories/GHSA-c87c-78rc-vmv2
Restart Required: Yes
Instructions:
1. Stop D-Tale service. 2. Update D-Tale: pip install --upgrade dtale==3.20.0. 3. Restart D-Tale service.
🔧 Temporary Workarounds
Network Restriction
linuxRestrict access to D-Tale to trusted IPs only using firewall rules.
iptables -A INPUT -p tcp --dport [D-TALE_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [D-TALE_PORT] -j DROP
Endpoint Disable
allDisable the vulnerable /save-column-filter endpoint if not required.
Modify D-Tale configuration to remove or restrict the endpoint
🧯 If You Can't Patch
- Isolate D-Tale instance in a restricted network segment with no internet access
- Implement web application firewall (WAF) rules to block malicious payloads targeting the endpoint
🔍 How to Verify
Check if Vulnerable:
Check D-Tale version: if version < 3.20.0 and endpoint is publicly accessible, system is vulnerable.Check Version:
python -c "import dtale; print(dtale.__version__)"Verify Fix Applied:
Confirm D-Tale version is 3.20.0 or higher and test endpoint with safe payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /save-column-filter endpoint
- Suspicious command execution patterns in system logs
Network Indicators:
- Unexpected outbound connections from D-Tale server
- Anomalous payloads to port 40000 (default D-Tale port)
SIEM Query:
source="*dtale*" AND (url="/save-column-filter" OR method="POST") AND (payload="*exec*" OR payload="*system*" OR payload="*subprocess*")