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BUG-HUNT: [security] Path traversal vulnerability in ContextAnalysisAgent #1890

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opened 2026-04-03 00:08:21 +00:00 by freemo · 2 comments

freemo commented

2026-04-03 00:08:21 +00:00

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Metadata

Branch: fix/security-path-traversal-context-analysis-agent
Commit Message: fix(agents): validate file paths against permitted base directory in ContextAnalysisAgent._load_files
Milestone: v3.6.0
Parent Epic: #400

Bug Report: [security] — Path traversal vulnerability in ContextAnalysisAgent

Severity Assessment

Impact: An attacker could read arbitrary files on the file system where the agent is running, by providing specially crafted file paths. This could lead to the disclosure of sensitive information.
Likelihood: Medium. An attacker would need to be able to control the input to the ContextAnalysisAgent.
Priority: High

Location

File: src/cleveragents/agents/graphs/context_analysis.py
Function/Class: ContextAnalysisAgent._load_files
Lines: 210-235

Description

The _load_files method in the ContextAnalysisAgent receives a list of file paths from the input state and loads them using langchain_community.document_loaders.TextLoader. The method does not validate whether the provided paths are within an expected base directory. This allows for a path traversal attack, where an attacker could provide a path like ../../../../etc/passwd to access sensitive files outside of the intended scope.

Evidence

    def _load_files(self, state: ContextAnalysisState) -> dict[str, Any]:
        """Load files and create Document objects.

        Args:
            state: Current workflow state

        Returns:
            Updated state with loaded documents
        """
        # ...
        for file_path in state["file_paths"]:
            try:
                path = Path(file_path)
                if not path.exists():
                    errors.append(f"File not found: {file_path}")
                    continue

                if not path.is_file():
                    errors.append(f"Not a file: {file_path}")
                    continue

                loader = TextLoader(str(path))
                loaded_docs: list[Document] = loader.load()
                documents.extend(loaded_docs)
            except Exception as exc:  # pragma: no cover - defensive
                errors.append(f"Error loading {file_path}: {exc!s}")
        # ...

Expected Behavior

The agent should only be able to access files within a predefined and restricted directory. Any attempt to access files outside of this directory should be blocked.

Actual Behavior

The agent can access any file on the file system that the user running the agent has read access to.

Suggested Fix

Before loading a file, its absolute path should be resolved and checked to ensure it is within a permitted base directory.

Example:

import os
from pathlib import Path

# Assume a permitted base directory is defined, for example, the current working directory.
PERMITTED_BASE_DIR = os.path.abspath(os.getcwd())

# ... inside _load_files ...
for file_path in state["file_paths"]:
    try:
        abs_path = os.path.abspath(file_path)
        if not abs_path.startswith(PERMITTED_BASE_DIR):
            errors.append(f"Access denied: {file_path} is outside the permitted directory.")
            continue

        path = Path(file_path)
        # ... rest of the loading logic ...

Subtasks

Identify and define the permitted base directory for ContextAnalysisAgent file access
Implement path resolution and validation logic in _load_files to reject paths outside the permitted base directory
Add appropriate error message to state when a path traversal attempt is detected
Write Behave unit tests covering: valid paths within permitted directory, path traversal attempts (e.g. ../../../../etc/passwd), symlink-based traversal attempts
Ensure all nox stages pass (nox -e lint, nox -e typecheck, nox -e unit_tests)
Verify coverage remains >= 97%

Definition of Done

ContextAnalysisAgent._load_files resolves all input paths to their absolute form before use
Any path that resolves outside the permitted base directory is rejected with a clear error message added to state
No path traversal attack vector remains in _load_files
Behave unit tests cover all path validation scenarios (valid, traversal, symlink)
All nox stages pass
Coverage >= 97%

Automated by CleverAgents Bot
Supervisor: Bug Hunting | Agent: ca-new-issue-creator

## Metadata - **Branch**: `fix/security-path-traversal-context-analysis-agent` - **Commit Message**: `fix(agents): validate file paths against permitted base directory in ContextAnalysisAgent._load_files` - **Milestone**: v3.6.0 - **Parent Epic**: #400 ## Bug Report: [security] — Path traversal vulnerability in ContextAnalysisAgent ### Severity Assessment - **Impact**: An attacker could read arbitrary files on the file system where the agent is running, by providing specially crafted file paths. This could lead to the disclosure of sensitive information. - **Likelihood**: Medium. An attacker would need to be able to control the input to the `ContextAnalysisAgent`. - **Priority**: High ### Location - **File**: `src/cleveragents/agents/graphs/context_analysis.py` - **Function/Class**: `ContextAnalysisAgent._load_files` - **Lines**: 210-235 ### Description The `_load_files` method in the `ContextAnalysisAgent` receives a list of file paths from the input state and loads them using `langchain_community.document_loaders.TextLoader`. The method does not validate whether the provided paths are within an expected base directory. This allows for a path traversal attack, where an attacker could provide a path like `../../../../etc/passwd` to access sensitive files outside of the intended scope. ### Evidence ```python def _load_files(self, state: ContextAnalysisState) -> dict[str, Any]: """Load files and create Document objects. Args: state: Current workflow state Returns: Updated state with loaded documents """ # ... for file_path in state["file_paths"]: try: path = Path(file_path) if not path.exists(): errors.append(f"File not found: {file_path}") continue if not path.is_file(): errors.append(f"Not a file: {file_path}") continue loader = TextLoader(str(path)) loaded_docs: list[Document] = loader.load() documents.extend(loaded_docs) except Exception as exc: # pragma: no cover - defensive errors.append(f"Error loading {file_path}: {exc!s}") # ... ``` ### Expected Behavior The agent should only be able to access files within a predefined and restricted directory. Any attempt to access files outside of this directory should be blocked. ### Actual Behavior The agent can access any file on the file system that the user running the agent has read access to. ### Suggested Fix Before loading a file, its absolute path should be resolved and checked to ensure it is within a permitted base directory. Example: ```python import os from pathlib import Path # Assume a permitted base directory is defined, for example, the current working directory. PERMITTED_BASE_DIR = os.path.abspath(os.getcwd()) # ... inside _load_files ... for file_path in state["file_paths"]: try: abs_path = os.path.abspath(file_path) if not abs_path.startswith(PERMITTED_BASE_DIR): errors.append(f"Access denied: {file_path} is outside the permitted directory.") continue path = Path(file_path) # ... rest of the loading logic ... ``` ### Category security ## Subtasks - [ ] Identify and define the permitted base directory for `ContextAnalysisAgent` file access - [ ] Implement path resolution and validation logic in `_load_files` to reject paths outside the permitted base directory - [ ] Add appropriate error message to state when a path traversal attempt is detected - [ ] Write Behave unit tests covering: valid paths within permitted directory, path traversal attempts (e.g. `../../../../etc/passwd`), symlink-based traversal attempts - [ ] Ensure all nox stages pass (`nox -e lint`, `nox -e typecheck`, `nox -e unit_tests`) - [ ] Verify coverage remains >= 97% ## Definition of Done - [ ] `ContextAnalysisAgent._load_files` resolves all input paths to their absolute form before use - [ ] Any path that resolves outside the permitted base directory is rejected with a clear error message added to state - [ ] No path traversal attack vector remains in `_load_files` - [ ] Behave unit tests cover all path validation scenarios (valid, traversal, symlink) - [ ] All nox stages pass - [ ] Coverage >= 97% --- **Automated by CleverAgents Bot** Supervisor: Bug Hunting | Agent: ca-new-issue-creator

freemo added this to the v3.6.0 milestone

2026-04-03 00:08:33 +00:00

freemo referenced this issue

2026-04-03 00:12:36 +00:00

BUG-HUNT: [boundary] Hardcoded Limits in Context Analysis Agent #1904

freemo commented

2026-04-03 00:12:57 +00:00

Author

Owner

Issue triaged by project owner:

State: Verified
MoSCoW: MoSCoW/Should Have — bug or error handling improvement.

Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: ca-project-owner

Issue triaged by project owner: - **State**: Verified - **MoSCoW**: MoSCoW/Should Have — bug or error handling improvement. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: ca-project-owner

freemo added a new dependency

2026-04-03 00:13:15 +00:00

#400 Epic: Post-MVP Security

freemo added a new dependency

2026-04-03 00:13:17 +00:00

#1669 Bug Hunting Session

freemo added the

labels

2026-04-03 00:17:02 +00:00

freemo referenced this issue

2026-04-03 00:19:35 +00:00

[Automated] Backlog Groomer Session State — v3.7.0 #1463

freemo removed the

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2026-04-03 00:28:02 +00:00

freemo commented

2026-04-05 07:23:28 +00:00

Author

Owner

Issue triaged by project owner:

State: Verified ✅
Priority: High → elevated importance due to security nature
Milestone: v3.6.0 (already assigned)
MoSCoW: Must Have — Path traversal vulnerability in ContextAnalysisAgent is a security issue. Per the specification, safety and security are non-negotiable. This must be fixed before the milestone can ship.

Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: ca-project-owner

Issue triaged by project owner: - **State**: Verified ✅ - **Priority**: High → elevated importance due to security nature - **Milestone**: v3.6.0 (already assigned) - **MoSCoW**: Must Have — Path traversal vulnerability in `ContextAnalysisAgent` is a security issue. Per the specification, safety and security are non-negotiable. This must be fixed before the milestone can ship. --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: ca-project-owner

freemo referenced this issue

2026-04-05 07:24:42 +00:00

[CA-AUTO] Project Owner — project-owner-1 — Session Tracker #2793

freemo referenced this issue

2026-04-05 08:49:48 +00:00

[CA-AUTO] Project Owner — project-owner-1 — Session Tracker #2793

freemo referenced this issue

2026-04-05 09:51:18 +00:00

[CA-AUTO] Project Owner — project-owner-1 — Session Tracker #2793