Detect CVE-2026-54769: Langroid TableChatAgent Sandbox Escape via eval() RCE in Microsoft Sentinel
Detects exploitation of CVE-2026-54769, a critical sandbox escape vulnerability in Langroid's TableChatAgent component (versions <= 0.65.1). The incomplete eval() mitigation allows attackers to craft malicious inputs that escape the intended sandbox and achieve remote code execution on the host system. CVSS 10.0 with public PoC available.
MITRE ATT&CK
- Tactic
- Execution Privilege Escalation
KQL Detection Query
let LangroidRCEIndicators = dynamic(['__import__', '__builtins__', 'os.system', 'subprocess', 'eval(', 'exec(', '__class__.__mro__', '__subclasses__', 'open(', 'importlib']);
let SuspiciousCommands = dynamic(['curl', 'wget', 'nc ', 'bash', 'sh -c', 'python -c', 'cmd.exe', 'powershell']);
union
(
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.WEB" or Category == "AppServiceHTTPLogs"
| where csUriStem has_any ("/chat", "/agent", "/query", "/ask")
| where csUriQuery has_any (LangroidRCEIndicators)
| project TimeGenerated, Resource, csUriStem, csUriQuery, csMethod, scStatus, clientIp_s
),
(
CommonSecurityLog
| where DeviceVendor == "Python" or ApplicationProtocol == "HTTP"
| where RequestURL has_any ("/chat", "/agent", "/query")
| where Message has_any (LangroidRCEIndicators)
| project TimeGenerated, DeviceAddress, RequestURL, Message, DestinationIP
),
(
Syslog
| where ProcessName in ("python", "python3", "uvicorn", "gunicorn", "fastapi")
| where SyslogMessage has_any (LangroidRCEIndicators)
| project TimeGenerated, HostName, ProcessName, SyslogMessage
),
(
SecurityEvent
| where EventID in (4688, 4689)
| where ParentProcessName has_any ("python.exe", "python3.exe", "uvicorn.exe")
| where CommandLine has_any (SuspiciousCommands)
| project TimeGenerated, Computer, Account, ParentProcessName, NewProcessName, CommandLine
)
| extend ThreatIndicator = "CVE-2026-54769-Langroid-RCE"
| order by TimeGenerated descDetects HTTP requests containing eval() sandbox escape payloads targeting Langroid TableChatAgent endpoints, and child process spawning from Python/Langroid processes indicative of successful RCE exploitation.
Data Sources
Required Tables
False Positives & Tuning
- Legitimate Python development or testing using eval() in unrelated applications hosted on the same infrastructure
- Security researchers or red team operators conducting authorized testing of Langroid deployments
- Automated integration tests that invoke TableChatAgent with complex query strings containing Python-like syntax
- Logging pipelines that capture and forward raw user input containing programming keywords
Other platforms for CVE-2026-54769
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Langroid TableChatAgent eval() Basic Sandbox Escape via __import__
Expected signal: Python process executing os.system() call; creation of /tmp/cve_2026_54769_poc.txt by the Python process; Syslog/auditd records showing system() syscall from python3 process
- Test 2Langroid TableChatAgent MRO Traversal Sandbox Escape for RCE
Expected signal: Python process spawning subprocess.Popen with system commands; process tree showing python3 as parent of id/sh commands; auditd EXECVE records for child process
- Test 3CVE-2026-54769 HTTP API Exploitation Simulation with Reverse Shell Payload
Expected signal: Outbound TCP connection from Python/uvicorn process to attacker IP:4444; bash process spawned as child of python3/uvicorn; network flow showing new connection to port 4444 from the Langroid server IP; HTTP access log entry with encoded payload in POST body
- Test 4Langroid Package Version Enumeration for CVE-2026-54769 Exposure Assessment
Expected signal: pip command execution; find/grep commands scanning for requirements files; curl requests to application health/version endpoints; process enumeration via ps
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