critical CVSS 9.8

CVE-2026-41497·Python vulnerability

PraisonAI is a multi-agent teams system. Prior to version 4.6.9, the fix for PraisonAI's MCP command handling does not add a command allowlist or argument validation to parse_mcp_command(), allowing arbitrary executables like bash, python, or /bin/sh with inline code execution flags to pass through to subprocess execution. This issue has been patched in version 4.6.9.

Severity: critical
Software: Python
Fixed in: 4.6.9
Published: 2026-05-08

Affected versions

Until: 4.6.9

Fixed in: 4.6.9

How to fix this CVE

If you are running PraisonAI, upgrade to version 4.6.9 or later immediately. This version patches a critical command injection vulnerability in the MCP command parser that could allow unauthenticated remote code execution. Ensure all dependencies are updated and redeploy your application after patching.

sudo dnf update python3 && pip install --upgrade praisonai==4.6.9

Defensia detects this vulnerability

How to check if you are affected

Check your PraisonAI version with: pip show praisonai | grep Version
Verify if MCP (Model Context Protocol) integration is enabled in your configuration by searching for 'mcp' in your PraisonAI config files
Search application logs for subprocess execution patterns matching bash, python, /bin/sh with -c or -e flags in the past 90 days: grep -r 'Popen\|subprocess\|bash -c\|python -c' /var/log/ 2>/dev/null
Confirm the patch by re-running pip show praisonai and verifying version >= 4.6.9

FAQ

What is CVE-2026-41497?

CVE-2026-41497 is a critical command injection flaw in PraisonAI's MCP command parser that fails to validate or restrict executable names and arguments, allowing attackers to execute arbitrary shell commands with full system privileges.

Is CVE-2026-41497 being actively exploited?

No, there are currently no confirmed active exploits or public proof-of-concept code available for this vulnerability. However, the critical CVSS score of 9.8 warrants immediate patching.

What versions of Python are affected by CVE-2026-41497?

CVE-2026-41497 affects PraisonAI versions prior to 4.6.9, not Python itself. Python 3 is the runtime environment required by PraisonAI.

How do I check if my server is vulnerable to CVE-2026-41497?

Run 'pip show praisonai' and check the version number. If it is below 4.6.9 and MCP functionality is enabled, your system is vulnerable.

Does Defensia detect CVE-2026-41497?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If PraisonAI is installed on a monitored server, CVE-2026-41497 will appear in your dashboard with remediation steps.

Related Python CVEs

CVE-2026-34938CVSS 10PraisonAI is a multi-agent teams system. Prior to version 1.5.90, execute_code() in praisonai-agents runs attacker-controlled Python inside a three-layer sandbox that can be fully bypassed by passing a str subclass with an overridden startswith() method to the _safe_getattr wrapper, achieving arbitrary OS command execution on the host. This issue has been patched in version 1.5.90.

CVE-2026-28505CVSS 10Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the str_eval() function in notification_handler.py implements a sandboxed eval() for notification text templates. The sandbox attempts to restrict callable names by inspecting code.co_names of the compiled code object. However, co_names only contains names from the outer code object. When a lambda expression is used, it creates a nested code object whose attribute accesses are stored in code.co_consts, NOT in code.co_names. The sandbox never inspects nested code objects. This issue has been patched in version 2.17.0.

CVE-2026-32871CVSS 10FastMCP is a Pythonic way to build MCP servers and clients. Prior to version 3.2.0, the OpenAPIProvider in FastMCP exposes internal APIs to MCP clients by parsing OpenAPI specifications. The RequestDirector class is responsible for constructing HTTP requests to the backend service. A vulnerability exists in the _build_url() method. When an OpenAPI operation defines path parameters (e.g., /api/v1/users/{user_id}), the system directly substitutes parameter values into the URL template string without URL-encoding. Subsequently, urllib.parse.urljoin() resolves the final URL. Since urljoin() interprets ../ sequences as directory traversal, an attacker controlling a path parameter can perform path traversal attacks to escape the intended API prefix and access arbitrary backend endpoints. This results in authenticated SSRF, as requests are sent with the authorization headers configured in the MCP provider. This issue has been patched in version 3.2.0.

CVE-2026-33054CVSS 10Mesop is a Python-based UI framework that allows users to build web applications. Versions 1.2.2 and below contain a Path Traversal vulnerability that allows any user supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation. This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds. This issue has been fixed in version 1.2.3.

CVE-2026-25632CVSS 10EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water distribution networks. Prior to 0.16.1, EPyT-Flow’s REST API parses attacker-controlled JSON request bodies using a custom deserializer (my_load_from_json) that supports a type field. When type is present, the deserializer dynamically imports an attacker-specified module/class and instantiates it with attacker-supplied arguments. This allows invoking dangerous classes such as subprocess.Popen, which can lead to OS command execution during JSON parsing. This also affects the loading of JSON files. This vulnerability is fixed in 0.16.1.

References

Track CVEs across your fleet automatically

Defensia scans your Linux servers and tells you exactly which ones are running vulnerable versions — including CVE-2026-41497. Free for 1 server.

Get started free