CVE-2026-55528
Received Received - Intake

Authentication Bypass in PraisonAI AgentServer

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: GitHub, Inc.

Description
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.58, AgentServer exposes ServerConfig.auth_token but AgentServer._create_app does not check it on any route. A remote caller can subscribe, publish, and perform other actions without a valid bearer token or X-Auth-Token even when authentication is configured. This issue is fixed in version 1.6.58.

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Meta Information

Published
2026-08-25
Last Modified
2026-08-25
Generated
2026-08-25
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-55528
EUVD
EUVD-2026-65497

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
praisonai praisonaiagents 1.6.58

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

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Executive Summary

This vulnerability in PraisonAI's praisonaiagents package (versions <= 1.6.48) involves the AgentServer component failing to enforce authentication despite declaring an auth_token configuration option. The server exposes endpoints like /info, /publish, /events, and /health without checking for valid bearer tokens or X-Auth-Token headers, even when authentication is configured.

Detection Guidance

Check if praisonaiagents version is <= 1.6.48 by running: pip show praisonaiagents. Verify unauthenticated access by sending requests to /info, /publish, /events, or /health endpoints without a token. Example: curl http://<server>:<port>/info

If the server responds without rejecting the request, the vulnerability likely exists. Also inspect server logs for unusual activity on these endpoints.

Impact Analysis

Attackers can exploit this to inject malicious events via /publish, eavesdrop on sensitive data through /events, leak server configuration via /info, or perform denial-of-service attacks by flooding /publish to overload subscriber queues.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, such as agent observations, plans, and user prompts, which may violate GDPR's data protection principles or HIPAA's confidentiality requirements. The lack of authentication on critical endpoints exposes personal or health-related data to potential breaches.

Mitigation Strategies

Upgrade praisonaiagents to version 1.6.58 or later using: pip install --upgrade praisonaiagents. If upgrading is not possible, restrict network access to the server via firewall rules or disable the exposed endpoints if unused.

Monitor traffic to the vulnerable endpoints and implement network-level authentication as a temporary measure until the upgrade is completed.

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