MervinPraison PraisonAI up to 1.6.77 AgentFlow workflows.py AgentFlow._resolve_pydantic_class sandbox

Summaryinfo

A vulnerability labeled as critical has been found in MervinPraison PraisonAI up to 1.6.77. Affected by this vulnerability is the function AgentFlow._resolve_pydantic_class of the file src/praisonai-agents/praisonaiagents/workflows/workflows.py of the component AgentFlow. The manipulation results in sandbox. This vulnerability is known as CVE-2026-61437. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAI up to 1.6.77. It has been classified as critical. Affected is the function AgentFlow._resolve_pydantic_class of the file src/praisonai-agents/praisonaiagents/workflows/workflows.py of the component AgentFlow. The manipulation with an unknown input leads to a sandbox vulnerability. CWE is classifying the issue as CWE-265. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

PraisonAI (pip package praisonaiagents) before 1.6.78 contains an unsafe dynamic module loading vulnerability in AgentFlow._resolve_pydantic_class (src/praisonai-agents/praisonaiagents/workflows/workflows.py). When a workflow step uses a string output_pydantic reference, the framework locates and imports a sibling tools.py from the workflow file's directory via importlib exec_module without sandboxing, ignoring the PRAISONAI_ALLOW_*_TOOLS environment variables. An attacker who controls a workflow file and its sibling tools.py can execute arbitrary Python code with the workflow runner's privileges when the workflow is executed via WorkflowManager or after load_yaml.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-61437 since 07/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1611.

Upgrading to version 1.6.78 eliminates this vulnerability.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAI

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.6.16
• 1.6.17
• 1.6.18
• 1.6.19
• 1.6.20
• 1.6.21
• 1.6.22
• 1.6.23
• 1.6.24
• 1.6.25
• 1.6.26
• 1.6.27
• 1.6.28
• 1.6.29
• 1.6.30
• 1.6.31
• 1.6.32
• 1.6.33
• 1.6.34
• 1.6.35
• 1.6.36
• 1.6.37
• 1.6.38
• 1.6.39
• 1.6.40
• 1.6.41
• 1.6.42
• 1.6.43
• 1.6.44
• 1.6.45
• 1.6.46
• 1.6.47
• 1.6.48
• 1.6.49
• 1.6.50
• 1.6.51
• 1.6.52
• 1.6.53
• 1.6.54
• 1.6.55
• 1.6.56
• 1.6.57
• 1.6.58
• 1.6.59
• 1.6.60
• 1.6.61
• 1.6.62
• 1.6.63
• 1.6.64
• 1.6.65
• 1.6.66
• 1.6.67
• 1.6.68
• 1.6.69
• 1.6.70
• 1.6.71
• 1.6.72
• 1.6.73
• 1.6.74
• 1.6.75
• 1.6.76
• 1.6.77

Website

• Product: https://github.com/MervinPraison/PraisonAI/

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