CVE-2026-44338 Overview
CVE-2026-44338 is a missing authentication vulnerability [CWE-306] in PraisonAI, a multi-agent teams system maintained by Mervin Praison. The flaw affects the legacy Flask API server shipped with PraisonAI from version 2.5.6 up to but not including version 4.6.34. Authentication is disabled by default on this server. Any caller with network reachability can query the /agents endpoint and invoke the configured agents.yaml workflow via /chat without supplying a token. The maintainer addressed the issue in version 4.6.34.
Critical Impact
Unauthenticated network attackers can enumerate available agents and execute agent workflows, leading to unauthorized use of LLM resources, data exposure, and abuse of integrated tools.
Affected Products
- PraisonAI versions 2.5.6 through 4.6.33
- Deployments exposing the legacy Flask API server
- Multi-agent workflows defined in agents.yaml
Discovery Timeline
- 2026-05-08 - CVE-2026-44338 published to NVD
- 2026-05-08 - Last updated in NVD database
Technical Details for CVE-2026-44338
Vulnerability Analysis
PraisonAI ships a legacy Flask-based HTTP API server intended to expose multi-agent functionality over the network. The server starts with authentication disabled by default. Operators who deploy this component without explicitly hardening it leave the API endpoints open to anonymous callers.
Two endpoints are reachable in this state. The /agents endpoint discloses the set of configured agents loaded from agents.yaml. The /chat endpoint triggers the configured agent workflow and returns model output. An attacker with network access to the listening port can drive these endpoints directly.
The consequences depend on how the deployment is configured. Agent workflows commonly invoke large language model (LLM) providers, retrieval pipelines, and external tools. Unauthenticated invocation can lead to billing abuse, prompt-driven data access, and downstream actions executed by integrated tools.
Root Cause
The root cause is missing authentication on a network-facing service [CWE-306]. The Flask server does not require a token, API key, or session before servicing requests. The insecure default places the burden of enabling authentication on the operator, which fails closed-by-default expectations for a multi-agent control plane.
Attack Vector
Exploitation requires only network access to the Flask API server. No credentials, user interaction, or prior foothold are needed. An attacker sends an HTTP GET request to /agents to enumerate configured agents, then issues an HTTP POST to /chat containing a prompt to invoke the workflow defined in agents.yaml. Where the server is reachable from the internet or a broad internal segment, exploitation is trivial.
No public proof-of-concept exploit is listed in the available references. Refer to the GitHub Security Advisory GHSA-6rmh-7xcm-cpxj for vendor-supplied details.
Detection Methods for CVE-2026-44338
Indicators of Compromise
- Unexpected HTTP requests to /agents or /chat on hosts running PraisonAI
- Outbound LLM provider traffic or token consumption spikes without a corresponding authenticated user session
- Agent workflow executions originating from external or unmanaged source IP addresses
Detection Strategies
- Inventory all PraisonAI deployments and identify versions between 2.5.6 and 4.6.33 running the legacy Flask API server
- Review web server and reverse proxy logs for anonymous access to /agents and /chat endpoints
- Correlate LLM API usage and tool invocation logs with authenticated identities to flag orphan executions
Monitoring Recommendations
- Alert on any HTTP request to PraisonAI API endpoints that lacks an Authorization header
- Monitor egress from PraisonAI hosts to LLM providers for volume anomalies
- Track changes to agents.yaml and the Flask server startup configuration
How to Mitigate CVE-2026-44338
Immediate Actions Required
- Upgrade PraisonAI to version 4.6.34 or later on all hosts running the Flask API server
- Restrict network exposure of the Flask server using firewall rules or a reverse proxy with authentication
- Audit recent /chat and /agents access logs for unauthorized invocations
Patch Information
The vulnerability is patched in PraisonAI version 4.6.34. Upgrade instructions and the full advisory are available in the GitHub Security Advisory GHSA-6rmh-7xcm-cpxj.
Workarounds
- Bind the Flask API server to 127.0.0.1 and front it with a reverse proxy that enforces authentication
- Place the service behind a VPN or zero-trust network access gateway until patching is complete
- Disable the legacy Flask API server if it is not required for production workloads
# Configuration example: upgrade PraisonAI and restrict network exposure
pip install --upgrade 'praisonai>=4.6.34'
# Restrict the Flask API to localhost via iptables (example)
iptables -A INPUT -p tcp --dport 8000 ! -s 127.0.0.1 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
