What is the CVSS score of CVE-2026-40154?

CVE-2026-40154 has a CVSS 3.1 base score of 9.3 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-40154?

Within 24 hours: Identify all systems running PraisonAI versions prior to 4.5.128 using asset inventory and network scanning; isolate affected systems from production networks pending remediation. Within 7 days: Contact PraisonAI vendor for patch timeline and interim mitigation guidance; implement application-layer controls to restrict template source URLs to whitelisted domains only. Within 30 days: Apply vendor-released patch immediately upon availability to all identified PraisonAI installations; validate patch deployment and restore systems to production networks only after security verification.

Praisonai CVE-2026-40154

Q: Which versions of Praisonai are affected by CVE-2026-40154?

PraisonAI multi-agent framework versions prior to 4.5.128 contain a critical remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary code by distributing…. A patch is available.

EUVD-2026-21212 CRITICAL

Inclusion of Functionality from Untrusted Control Sphere (CWE-829)

2026-04-09 security-advisories@github.com

GHSA-pv9q-275h-rh7x

Information Disclosure Praisonai Praison

9.3

CVSS 3.1 · GitHub Advisory

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Attacker hosts malicious template file
Exploit

PraisonAI fetches template from remote source
Execution

System executes template as trusted code
Impact

Arbitrary code execution within multi-agent environment

Vulnerability Assessment

Weakness	CWE CWE-829 OWASP Top 10:2025 A08:2025 - Software or Data Integrity Failures ASVS 5.0 V15 - Secure Coding and Architecture Trusted source inclusion only
Exploitation Conditions	PraisonAI versions prior to 4.5.128. Attacker crafts malicious template file hosted remotely. Victim must trigger remote template fetch/load in PraisonAI application. No authentication required. Supply chain attack via compromised or attacker-controlled template source.
Impact	CVSS 9.3 reflects unauthenticated network exploitation with user interaction. Remotely fetched templates execute without validation, enabling supply chain compromise. High impact on confidentiality and integrity across systems using PraisonAI. No EPSS/KEV data available. Priority depends on deployment scope and template source control maturity in target environments.
Exploit ScenarioDerived	Attacker hosts malicious template file on accessible server. User or automated system fetches template via PraisonAI without verification. Malicious code executes in application context with full privileges. User interaction required (template load trigger).

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 09, 2026

Remote code execution in PraisonAI multi-agent framework (versions prior to 4.5.128) allows unauthenticated attackers to execute arbitrary code via malicious template files fetched from remote sources. The framework downloads and executes template files without integrity verification, origin validation, or user confirmation, creating a supply chain attack vector. Attackers with network access can distribute weaponized templates that execute when retrieved by victims, achieving high confidentiality and integrity compromise with scope change. No public exploit identified at time of analysis.

RemediationAI

Vendor-released patch: upgrade to PraisonAI version 4.5.128 or later, which implements integrity verification for remote templates. Organizations should immediately update to the fixed version via standard package manager (pip install --upgrade praisonai). Until patching is complete, disable remote template fetching functionality if operationally feasible, restrict template sources to trusted internal repositories only, and implement network-level controls to prevent outbound template retrieval. Review recent template usage logs for indicators of compromise. Full vulnerability disclosure and remediation guidance available at https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pv9q-275h-rh7x

Affected VersionsENISA

PraisonAI < 4.5.128

Affected Packages

pypi praisonai fix: 4.5.128

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in pypi

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-829 (Inclusion of Functionality from Untrusted Control Sphere) flaw in PraisonAI's template handling mechanism. System directly executes remotely sourced template content without cryptographic signature verification or origin allowlist enforcement. CVSS:3.1 vector AV:N/AC:L/PR:N/UI:R/S:C indicates network-exploitable with user interaction requirement, enabling cross-scope compromise when victim retrieves attacker-controlled template.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 9.3 CRITICAL

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Patch released

Apr 10, 2026 - 20:30 nvd

Patch available

CVE Published

Apr 09, 2026 - 22:16 nvd

CRITICAL 9.3

DescriptionGitHub Advisory

PraisonAI is a multi-agent teams system. Prior to 4.5.128, PraisonAI treats remotely fetched template files as trusted executable code without integrity verification, origin validation, or user confirmation, enabling supply chain attacks through malicious templates. This vulnerability is fixed in 4.5.128.

Executive ViewAI

Why It Matters

PraisonAI multi-agent framework versions prior to 4.5.128 contain a critical remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary code by distributing malicious template files. Organizations using PraisonAI are exposed to supply chain compromise where templates downloaded and executed by the framework can be weaponized to breach system integrity and data confidentiality. With no vendor patch currently available, immediate isolation of affected systems is required to prevent potential lateral movement and data exfiltration.

Business Impact: Severe

Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: (1) Restrict PraisonAI framework network access to trusted internal networks only; (2) Implement strict URL whitelisting for template sources with manual review of all template URLs before execution; (3) Disable remote template fetching where operationally feasible and use only pre-validated, locally-stored templates; (4) Monitor PraisonAI process execution and network connections for anomalous behavior; (5) Maintain isolated test environments for PraisonAI validation separate from production systems; (6) Monitor vendor advisories and CISA KEV for patch release notification.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Threat Intel

1 source

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment GHSA

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision

Out-of-Cycle

Exploitation

Poc

System Exposure· derived

Open

Automatable

Human Impact

Very High

Technical Impact

Total

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +46

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.