CVE-2026-24478: Mintplexlabs AnythingLLM RCE Vulnerability

CVE-2026-24478 Overview

CVE-2026-24478 is a critical Path Traversal vulnerability affecting AnythingLLM, an application that transforms content into context for Large Language Models (LLMs) to use as references during chatting. The vulnerability exists in the DrupalWiki integration component and allows a malicious admin (or an attacker who can convince an admin to configure a malicious DrupalWiki URL) to write arbitrary files to the server. This can lead to Remote Code Execution (RCE) by overwriting configuration files or writing executable scripts.

Critical Impact

Attackers can achieve Remote Code Execution by exploiting this path traversal flaw to write malicious files to arbitrary locations on the server, potentially compromising the entire system hosting AnythingLLM.

Affected Products

• Mintplexlabs AnythingLLM versions prior to 1.10.0

Discovery Timeline

• 2026-01-27 - CVE-2026-24478 published to NVD
• 2026-01-28 - Last updated in NVD database

Technical Details for CVE-2026-24478

Vulnerability Analysis

This vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as Path Traversal. The flaw resides in the DrupalWiki integration feature of AnythingLLM, which fails to properly sanitize user-controlled input when processing file paths.

When an administrator configures a DrupalWiki integration URL, the application processes responses without adequately validating path components. An attacker who can control or influence this URL (either by being a malicious admin or through social engineering a legitimate admin) can craft requests that include path traversal sequences such as ../ to escape the intended directory structure.

The vulnerability requires high privileges (admin access) to exploit but does not require user interaction once the malicious configuration is in place. The attack can be executed remotely over the network, making it a significant threat to exposed AnythingLLM instances.

Root Cause

The root cause of CVE-2026-24478 is insufficient input validation in the DrupalWiki integration module. The application fails to properly sanitize or validate file paths derived from external URL responses before using them in file write operations. This allows directory traversal sequences to be interpreted literally, enabling writes outside the intended directory boundary.

The lack of path canonicalization and boundary checks permits an attacker to traverse the directory structure and place files in arbitrary locations on the filesystem accessible to the AnythingLLM process.

Attack Vector

The attack requires the following conditions:

1. Administrative access - The attacker either has legitimate admin credentials or can social engineer an admin to configure a malicious DrupalWiki URL
2. Malicious URL configuration - A specially crafted DrupalWiki endpoint URL is configured that returns responses containing path traversal payloads
3. File write capability - The application processes the malicious response and writes files to attacker-controlled paths

Once these conditions are met, an attacker can overwrite critical configuration files, plant web shells, or inject malicious scripts that will be executed by the server, achieving full Remote Code Execution.

The vulnerability exploits the trust placed in the configured DrupalWiki URL by injecting path traversal sequences (e.g., ../../etc/cron.d/malicious or ../../var/www/html/shell.php) into file paths processed by the integration. See the GitHub Security Advisory for additional technical details.

Detection Methods for CVE-2026-24478

Indicators of Compromise

• Unexpected files appearing outside the AnythingLLM application directory, particularly in web-accessible or system configuration directories
• Modified configuration files or newly created executable scripts in sensitive locations
• Suspicious DrupalWiki integration URLs configured in the admin panel containing unusual characters or external domains
• Web server logs showing requests to newly created files that shouldn't exist

Detection Strategies

• Monitor file system activity for writes to directories outside the AnythingLLM installation path, especially during DrupalWiki sync operations
• Implement file integrity monitoring (FIM) on critical system directories such as /etc/, web roots, and cron directories
• Review AnythingLLM admin configurations for DrupalWiki integrations pointing to untrusted or unexpected URLs
• Deploy web application firewalls (WAF) with rules to detect path traversal patterns in HTTP responses

Monitoring Recommendations

• Enable detailed logging for all DrupalWiki integration activities and file operations within AnythingLLM
• Set up alerts for any file creation or modification events in system directories triggered by the AnythingLLM process
• Regularly audit admin account activity and configuration changes, particularly around integration settings
• Monitor network traffic for connections to suspicious external DrupalWiki endpoints

How to Mitigate CVE-2026-24478

Immediate Actions Required

• Upgrade AnythingLLM to version 1.10.0 or later immediately to remediate this vulnerability
• Audit all existing DrupalWiki integration configurations for suspicious or unauthorized URLs
• Review recently created or modified files on the server to identify any potential compromise artifacts
• Restrict admin access to trusted users only and implement multi-factor authentication where possible

Patch Information

Mintplex Labs has addressed this vulnerability in AnythingLLM version 1.10.0. Users should upgrade to this version or later to receive the security fix. The patch implements proper path validation and sanitization in the DrupalWiki integration module to prevent directory traversal attacks.

For detailed information about the fix, refer to the GitHub Security Advisory GHSA-jp2f-99h9-7vjv.

Workarounds

• If immediate upgrade is not possible, disable or remove all DrupalWiki integrations until the patch can be applied
• Implement network-level restrictions to limit AnythingLLM's ability to connect to external URLs
• Run AnythingLLM with minimal filesystem permissions using a dedicated service account with restricted write access
• Deploy the application in a containerized environment with read-only filesystem mounts where possible

# Verify your AnythingLLM version
# Upgrade to 1.10.0 or later if running a vulnerable version
docker pull mintplexlabs/anythingllm:latest

# Or for npm installations, update to the latest version
npm update anythingllm

# Restrict the application's write permissions (example for Linux)
chown -R anythingllm:anythingllm /opt/anythingllm/data
chmod -R 750 /opt/anythingllm/data