MervinPraison PraisonAI up to 4.5.68 anyio.open_process mcp os command injection

Summaryinfo

A vulnerability was found in MervinPraison PraisonAI up to 4.5.68. It has been declared as critical. This vulnerability affects the function anyio.open_process. Executing a manipulation of the argument mcp can lead to os command injection. This vulnerability is registered as CVE-2026-34935. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component. This entry seems to have a duplicate CVE-2026-41497 assigned.

Detailsinfo

A vulnerability has been found in MervinPraison PraisonAI up to 4.5.68 and classified as critical. This vulnerability affects the function anyio.open_process. The manipulation of the argument mcp with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

PraisonAI is a multi-agent teams system. From version 4.5.15 to before version 4.5.69, the --mcp CLI argument is passed directly to shlex.split() and forwarded through the call chain to anyio.open_process() with no validation, allowlist check, or sanitization at any hop, allowing arbitrary OS command execution as the process user. This issue has been patched in version 4.5.69.

The advisory is available at github.com. This vulnerability was named CVE-2026-34935 since 03/31/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 4.5.69 eliminates this vulnerability. Applying the patch 47bff65413beaa3c21bf633c1fae4e684348368c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAI

Version

• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 4.5.7
• 4.5.8
• 4.5.9
• 4.5.10
• 4.5.11
• 4.5.12
• 4.5.13
• 4.5.14
• 4.5.15
• 4.5.16
• 4.5.17
• 4.5.18
• 4.5.19
• 4.5.20
• 4.5.21
• 4.5.22
• 4.5.23
• 4.5.24
• 4.5.25
• 4.5.26
• 4.5.27
• 4.5.28
• 4.5.29
• 4.5.30
• 4.5.31
• 4.5.32
• 4.5.33
• 4.5.34
• 4.5.35
• 4.5.36
• 4.5.37
• 4.5.38
• 4.5.39
• 4.5.40
• 4.5.41
• 4.5.42
• 4.5.43
• 4.5.44
• 4.5.45
• 4.5.46
• 4.5.47
• 4.5.48
• 4.5.49
• 4.5.50
• 4.5.51
• 4.5.52
• 4.5.53
• 4.5.54
• 4.5.55
• 4.5.56
• 4.5.57
• 4.5.58
• 4.5.59
• 4.5.60
• 4.5.61
• 4.5.62
• 4.5.63
• 4.5.64
• 4.5.65
• 4.5.66
• 4.5.67
• 4.5.68

License

• open-source

Website

• Product: https://github.com/MervinPraison/PraisonAI/

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