TI-2026-27161 Aliases CVE-2026-34937 GHSA-w37c-qqfp-c67f

PraisonAI: Shell Injection in run_python() via Unescaped $() Substitution

HIGH 76CWE-78Published 2026-04-03 · Updated 2026-04-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

PraisonAI is a multi-agent teams system. Prior to version 1.5.90, run_python() in praisonai constructs a shell command string by interpolating user-controlled code into python3 -c "<code>" and passing it to subprocess.run(..., shell=True). The escaping logic only handles \ and ", leaving $() and backtick substitutions unescaped, allowing arbitrary OS command execution before Python is invoked. This issue has been patched in version 1.5.90.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00567 47th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed PraisonAI (MervinPraison): 1.5.90praisonaiagents (PyPI): 1.5.90

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MervinPraison	PraisonAI	before 1.5.90	1.5.90	Patch available	CNA
—	praisonaiagents (PyPI)	before 1.5.90	1.5.90	Patch available	GHSA-w37c-qqfp-c67f

PraisonAI VendorMervinPraison Affected before 1.5.90 Fixed in 1.5.90 Patch available CNA
praisonaiagents (PyPI) Vendor— Affected before 1.5.90 Fixed in 1.5.90 Patch available GHSA-w37c-qqfp-c67f

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:praison:praisonaiagents::::::::	before 1.5.90	Vulnerable	MervinPraison

cpe:2.3:a:praison:praisonaiagents:*:*:*:*:*:*:*:* Versions before 1.5.90 Vulnerable ·MervinPraison

Remediation

Fix · CNA PraisonAI (MervinPraison) Fixed in 1.5.90
Fix · GHSA-w37c-qqfp-c67f praisonaiagents (PyPI) Fixed in 1.5.90 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-34937
2026-10-03 Alias added: GHSA-w37c-qqfp-c67f

References

TI-2026-29070 PraisonAI: Critical RCE via `type: job` workflow YAML CVSS 3.1CRITICAL 9.8
TI-2026-27162 PraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code CVSS 3.1CRITICAL 10.0
TI-2026-29071 PraisonAI Browser Server allows unauthenticated WebSocket clients to hijack connected extension sessions CVSS 3.1CRITICAL 9.1
TI-2026-32306 PraisonAI has unsafe tool resolution in `ToolExecutionMixin.execute_tool`: undeclared `__main__` callables execute CVSS 3.1HIGH 8.6
TI-2026-27178 PraisonAI: SSRF in FileTools.download_file() via Unvalidated URL CVSS 3.1HIGH 8.6
TI-2026-28937 PraisonAIAgents has an OS Command Injection via shell=True in Memory Hooks Executor (memory/hooks.py) CVSS 4.0CRITICAL 9.3

See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences