Authentication Bypass Vulnerability in PraisonAI by MervinPraison
CVE-2026-57134

8.2HIGH

Key Information:

Vendor

Mervinpraison

Status
Praisonai
Vendor
CVE Published:
15 September 2026

What is CVE-2026-57134?

PraisonAI, a multi-agent system, has a vulnerability that allows unauthenticated access to protected tools and resources for versions from 1.5.1 to 1.7.2. The issue lies within the MCPSecurity.evaluatePolicy() method, which fails to invoke credential validation for Basic and OAuth authentication methods when presented with a non-empty Authorization header. As a result, users can bypass authentication and gain access to secure functionalities without proper credentials. This flaw has been resolved in version 1.7.2, where enhanced validation procedures have been implemented.

Affected Version(s)

PraisonAI >= 1.5.1, < 1.7.2

References

https://github.com/MervinPraison/PraisonAI/security/advis...
x_refsource_CONFIRM
https://github.com/MervinPraison/PraisonAI/commit/709a038...
x_refsource_MISC
https://github.com/MervinPraison/PraisonAI/releases/tag/v...
x_refsource_MISC

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.