CVE-2026-73678: MindsDB Unauthenticated RCE via Anton Agent Scratchpad — Detection and Remediation Guide

---
title: MindsDB Anton Agent Process Spawning Shell or Command Interpreter
id: 3f8a1c74-2b6e-4d91-a7c3-9e2f5b8d4a01
status: experimental
description: Detects the MindsDB Python process spawning shells or command interpreters, consistent with CVE-2026-73678 exploitation where attacker-controlled Python reaching exec() executes OS commands.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-73678
  - https://attack.mitre.org/techniques/T1059/
author: Security Arsenal
date: 2026/05/14
tags:
  - attack.execution
  - attack.t1059
  - attack.t1059.006
logsource:
  category: process_creation
  product: linux
detection:
  selection_parent:
    ParentCommandLine|contains:
      - 'mindsdb'
      - 'minds'
  selection_child:
    CommandLine|contains:
      - '/bin/sh'
      - '/bin/bash'
      - 'curl '
      - 'wget '
      - 'nc '
      - 'ncat'
      - 'base64 -d'
      - 'chmod +x'
      - '/etc/passwd'
      - 'id;'
  condition: selection_parent and selection_child
falsepositives:
  - Rare; legitimate MindsDB integrations that shell out should be enumerated and allowlisted explicitly
level: critical
---
title: MindsDB Anton Agent Suspicious Python Exec Usage
id: 8c2d5e91-4a7b-4f36-b8d1-6c3a9e5f2b07
status: experimental
description: Detects Python processes associated with MindsDB executing inline code with OS-level modules, a hallmark of scratchpad exec() abuse via CVE-2026-73678.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-73678
  - https://attack.mitre.org/techniques/T1059.006/
author: Security Arsenal
date: 2026/05/14
tags:
  - attack.execution
  - attack.t1059.006
logsource:
  category: process_creation
  product: linux
detection:
  selection:
    CommandLine|contains:
      - 'python'
    CommandLine|contains:
      - 'os.system'
      - 'subprocess'
      - 'os.popen'
      - 'pty.spawn'
      - 'socket.connect'
      - 'base64.b64decode'
  filter_known:
    CommandLine|contains:
      - 'mindsdb/interfaces'
      - 'site-packages'
  condition: selection and not filter_known
falsepositives:
  - Legitimate Python automation on the same host; correlate parent process and working directory with the MindsDB service
level: high
---
title: HTTP Access to MindsDB Unauthenticated API Endpoints
id: 5b1e7c43-9d2a-4e85-a6f4-2d8b3c7e1a95
status: experimental
description: Detects HTTP requests to the unauthenticated MindsDB endpoints abused in CVE-2026-73678 - PUT /api/v1/settings/ (attacker LLM key injection) and POST /api/v1/responses/ (prompt-driven code execution). Deploy against reverse proxy, WAF, or web server access logs fronting MindsDB.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-73678
  - https://attack.mitre.org/techniques/T1190/
author: Security Arsenal
date: 2026/05/14
tags:
  - attack.initial_access
  - attack.t1190
logsource:
  category: webserver
detection:
  selection_settings:
    c-uri|contains: '/api/v1/settings'
    cs-method: 'PUT'
  selection_responses:
    c-uri|contains: '/api/v1/responses'
    cs-method: 'POST'
  condition: 1 of selection_*
falsepositives:
  - Legitimate UI-driven configuration changes will hit /api/v1/settings; alert on requests from non-UI source IPs or with anomalous frequency
level: high

// Hunt for CVE-2026-73678 exploitation: MindsDB unauthenticated endpoint abuse
let Lookback = 14d;
let SuspiciousURIs = dynamic(["/api/v1/settings", "/api/v1/responses"]);
let WebHits = union isfuzzy=true
    (CommonSecurityLog
    | where TimeGenerated > ago(Lookback)
    | where RequestURL has_any (SuspiciousURIs)
    | where RequestMethod in ("PUT", "POST")
    | project TimeGenerated, SourceIP, RequestMethod, RequestURL, SourceUserAgent, DeviceAction, LogSource=tostring(Type)),
    (Syslog
    | where TimeGenerated > ago(Lookback)
    | where SyslogMessage has_any (SuspiciousURIs)
    | where SyslogMessage has_any ("PUT", "POST")
    | extend SourceIP = extract(@"src=(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})", 1, SyslogMessage)
    | extend RequestURL = extract(@"(PUT|POST) (/api/v1/[a-z/]+)", 2, SyslogMessage)
    | extend RequestMethod = extract(@"(PUT|POST) /api/v1/", 1, SyslogMessage)
    | project TimeGenerated, SourceIP, RequestMethod, RequestURL, SyslogMessage, LogSource=tostring(Type));
WebHits
| summarize FirstSeen=min(TimeGenerated), LastSeen=max(TimeGenerated), HitCount=count(), Methods=make_set(RequestMethod), Endpoints=make_set(RequestURL) by SourceIP
// Flag source IPs that hit BOTH endpoints — the two-stage exploit chain
| where array_length(Endpoints) > 1
| order by HitCount desc;
// Correlate with process execution on MindsDB hosts (Defender for Endpoint)
DeviceProcessEvents
| where TimeGenerated > ago(Lookback)
| where InitiatingProcessCommandLine has_any ("mindsdb", "minds")
| where FileName in~ ("sh", "bash", "dash", "curl", "wget", "nc", "ncat", "chmod")
| project TimeGenerated, DeviceName, InitiatingProcessCommandLine, FileName, ProcessCommandLine, AccountName
| order by TimeGenerated desc

-- CVE-2026-73678: Hunt MindsDB/Anton agent process tree and network activity
-- Look for python processes running MindsDB and their suspicious children
LET mindsdb_procs = SELECT Pid, Ppid, Name, CommandLine, Exe, Username, CreateTime
FROM pslist()
WHERE CommandLine =~ 'mindsdb|minds'
   OR Exe =~ 'mindsdb'

SELECT Pid, Ppid, Name, CommandLine, Exe, Username, CreateTime,
       if(condition=CommandLine =~ 'sh|bash|curl|wget|nc |subprocess|os\.system',
          then='SUSPICIOUS_CHILD_OR_CMD',
          else='review') AS Verdict
FROM pslist()
WHERE CommandLine =~ 'python|mindsdb|/bin/sh|/bin/bash|curl|wget|nc |ncat'
   OR Ppid IN (SELECT Pid FROM mindsdb_procs)

-- Also enumerate active network connections from python processes
SELECT Pid, Name, CommandLine, netstat().LocalIP, netstat().LocalPort,
       netstat().RemoteIP, netstat().RemotePort, netstat().Status
FROM pslist()
WHERE Name =~ 'python'
  AND netstat().Status = 'ESTABLISHED'
  AND NOT netstat().RemoteIP =~ '^(10\.|172\.(1[6-9]|2[0-9]|3[01])\.|192\.168\.|127\.)'

#!/bin/bash
# CVE-2026-73678 - MindsDB Minds Platform emergency response script
# Run as root on the MindsDB host. Review output before/after applying blocks.

set -u
echo "=== CVE-2026-73678 MindsDB Exposure Check ==="

# 1. Identify running MindsDB processes and version
echo "[*] Running MindsDB processes:"
ps aux | grep -iE 'mindsdb|minds' | grep -v grep

# 2. Check listening ports (default MindsDB HTTP API: 47334)
echo "[*] Listening sockets for MindsDB:"
ss -tlnp | grep -iE 'python|47334' || netstat -tlnp 2>/dev/null | grep -iE 'python|47334'

# 3. EMERGENCY CONTAINMENT: restrict API port to localhost if the service
#    does not legitimately need remote access (preferred interim control)
echo "[*] Applying iptables rule to drop external access to TCP 47334..."
iptables -C INPUT -p tcp --dport 47334 ! -s 127.0.0.1 -j DROP 2>/dev/null || \
iptables -I INPUT -p tcp --dport 47334 ! -s 127.0.0.1 -j DROP
echo "[+] External access to 47334 blocked. Localhost remains functional."

# 4. If MindsDB sits behind nginx, add this deny block instead:
#    location ~ ^/api/v1/(settings|responses)/ { return 403; }

# 5. Hunt access logs for exploitation attempts
echo "[*] Searching web/access logs for exploit endpoints..."
for log in /var/log/nginx/access.log /var/log/apache2/access.log /var/log/mindsdb/*.log; do
  if [ -f "$log" ]; then
    echo "--- $log ---"
    grep -E 'PUT /api/v1/settings|POST /api/v1/responses' "$log" | tail -50
  fi
done

# 6. Hunt shell history / process artifacts for post-exploitation
echo "[*] Checking for suspicious child processes of MindsDB (current snapshot):"
for pid in $(pgrep -f 'mindsdb|minds'); do
  echo "--- children of PID $pid ---"
  ps --ppid "$pid" -o pid,cmd 2>/dev/null
done

echo "[*] Recent cron and persistence check:"
crontab -l 2>/dev/null | grep -vE '^#' | grep -E 'curl|wget|python|base64' || echo "none flagged"
ls -la /etc/cron.d/ 2>/dev/null

echo "=== DONE. Upgrade MindsDB to the fixed release > 26.1.0 before re-opening access. ==="