Critical severity · published Apr 9, 2026
CVE-2026-40088
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in praisonai
9.6
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PR
PraisonAI · MervinPraison
< 4.5.121 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40088
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40088
Release Notes
https://github.com/MervinPraison/PraisonAI/releases/tag/v4.5.121
Exploit
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-2763-cj5r-c79m
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