Arbitrary OS Command Execution Vulnerability in PraisonAI by MervinPraison
CVE-2026-34935

9.8CRITICAL

Key Information:

Vendor

Mervinpraison

Status
Praisonai
Vendor
CVE Published:
3 April 2026

What is CVE-2026-34935?

PraisonAI, a multi-agent systems platform, contains a significant vulnerability where the --mcp CLI argument is insufficiently validated. Versions 4.5.15 through 4.5.68 are susceptible to arbitrary OS command execution due to this weakness. The argument is passed unchecked through shlex.split() and subsequently forwarded to anyio.open_process(), enabling an attacker to execute arbitrary commands as the process user. This critical issue has been addressed and patched in version 4.5.69. Users are encouraged to upgrade to ensure their systems remain secure.

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Affected Version(s)

PraisonAI >= 4.5.15, < 4.5.69

References

https://github.com/MervinPraison/PraisonAI/security/advis...
x_refsource_CONFIRM
https://github.com/MervinPraison/PraisonAI/commit/47bff65...
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CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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