TI-2026-28973 Aliases CVE-2026-40158 GHSA-3c4r-6p77-xwr7

PraisonAI has Improper Control of Generation of Code ('Code Injection') and Protection Mechanism Failure in praisonai

HIGH 72CWE-693Published 2026-04-10 · Updated 2026-04-10

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass, Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-693 and CWE-94.

Summary

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI's AST-based Python sandbox can be bypassed using type.__getattribute__ trampoline, allowing arbitrary code execution when running untrusted agent code. The _execute_code_direct function in praisonaiagents/tools/python_tools.py uses AST filtering to block dangerous Python attributes like __subclasses__, __globals__, and __bases__. However, the filter only checks ast.Attribute nodes, allowing a bypass. The sandbox relies on AST-based filtering of attribute access but fails to account for dynamic attribute resolution via built-in methods such as type.getattribute, resulting in incomplete enforcement of security restrictions. The string '__subclasses__' is an ast.Constant, not an ast.Attribute, so it is never checked against the blocked list. This vulnerability is fixed in 4.5.128.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00244 15th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed PraisonAI (MervinPraison): 4.5.128PraisonAI (PyPI): 4.5.128

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 4.5.128	4.5.128	Patch available	CNA
—	PraisonAI (PyPI)	before 4.5.128	4.5.128	Patch available	GHSA-3c4r-6p77-xwr7

PraisonAI VendorMervinPraison Affected before 4.5.128 Fixed in 4.5.128 Patch available CNA
PraisonAI (PyPI) Vendor— Affected before 4.5.128 Fixed in 4.5.128 Patch available GHSA-3c4r-6p77-xwr7

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:praison:praisonai::::::::	before 4.5.128	Vulnerable	MervinPraison

cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* Versions before 4.5.128 Vulnerable ·MervinPraison

Remediation

Fix · CNA PraisonAI (MervinPraison) Fixed in 4.5.128
Fix · GHSA-3c4r-6p77-xwr7 PraisonAI (PyPI) Fixed in 4.5.128 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-40158
2026-10-03 Alias added: GHSA-3c4r-6p77-xwr7

References

Exploit 1

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-3c4r-6p77-xwr7

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-40158

Other 2

TI-2026-30083 Incomplete fix for CVE-2026-34935: Command Injection in MervinPraison/PraisonAI CVSS 3.1CRITICAL 9.8
TI-2026-29070 PraisonAI: Critical RCE via `type: job` workflow YAML CVSS 3.1CRITICAL 9.8
TI-2026-28940 PraisonAI has Server-Side Request Forgery via Unvalidated webhook_url in Jobs API CVSS 3.1CRITICAL 10.0
TI-2026-28768 PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading CVSS 3.1CRITICAL 9.8
TI-2026-27159 PraisonAI: OS Command Injection in MCPHandler.parse_mcp_command() CVSS 3.1CRITICAL 9.8
TI-2026-27158 PraisonAI: Second-Order SQL Injection in `get_all_user_threads` CVSS 3.1CRITICAL 9.8

See all 42 →

Sources

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