CVE-2026-40088

Name: CVE-2026-40088
Creator: NVD / NIST
Published: 2026-04-09T20:16:27.597+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2026-40088 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. PraisonAI is a multi-agent teams system. Prior to 4.5.121, the execute_command function and workflow shell execution are exposed to user-controlled input via agent workflows, YAML definitions, and LLM-generated tool calls, allowing attackers to inject arbitrary shell commands through shell metacharacters. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

PraisonAI is a multi-agent teams system. Prior to 4.5.121, the execute_command function and workflow shell execution are exposed to user-controlled input via agent workflows, YAML definitions, and LLM-generated tool calls, allowing attackers to inject arbitrary shell commands through shell metacharacters. This vulnerability is fixed in 4.5.121.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Probability

0.42%

33.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Praison	Praisonai	< 4.5.121

References

https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.121Release Notes
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2763-cj5r-c79mExploit, Vendor Advisory

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-40088?

How severe is CVE-2026-40088?

CVE-2026-40088 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2026-40088?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-40088?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST