CVE-2026-34935: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in MervinPraison PraisonAI
CVE-2026-34935 is a critical OS command injection vulnerability in MervinPraison PraisonAI versions 4. 5. 15 up to but not including 4. 5. 69. The vulnerability arises because the --mcp CLI argument is passed without validation or sanitization to shlex. split() and then to anyio. open_process(), allowing arbitrary OS command execution as the process user. This issue has been fixed in version 4. 5.
AI Analysis
Technical Summary
PraisonAI, a multi-agent teams system, versions from 4.5.15 to before 4.5.69, improperly handle the --mcp command-line argument by forwarding it directly to shlex.split() and subsequently to anyio.open_process() without any validation, allowlist checks, or sanitization. This flaw allows an attacker to execute arbitrary operating system commands with the privileges of the process user. The vulnerability is identified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command). The issue has been patched in version 4.5.69.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary OS commands on the affected system with the privileges of the PraisonAI process user. This can lead to complete system compromise, including confidentiality, integrity, and availability impacts. The CVSS score of 9.8 reflects the high potential impact and ease of exploitation.
Mitigation Recommendations
Upgrade PraisonAI to version 4.5.69 or later, where this OS command injection vulnerability has been patched. No other mitigations are specified or recommended beyond applying the official fix.
CVE-2026-34935: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in MervinPraison PraisonAI
Description
CVE-2026-34935 is a critical OS command injection vulnerability in MervinPraison PraisonAI versions 4. 5. 15 up to but not including 4. 5. 69. The vulnerability arises because the --mcp CLI argument is passed without validation or sanitization to shlex. split() and then to anyio. open_process(), allowing arbitrary OS command execution as the process user. This issue has been fixed in version 4. 5.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PraisonAI, a multi-agent teams system, versions from 4.5.15 to before 4.5.69, improperly handle the --mcp command-line argument by forwarding it directly to shlex.split() and subsequently to anyio.open_process() without any validation, allowlist checks, or sanitization. This flaw allows an attacker to execute arbitrary operating system commands with the privileges of the process user. The vulnerability is identified as CWE-78 (Improper Neutralization of Special Elements used in an OS Command). The issue has been patched in version 4.5.69.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary OS commands on the affected system with the privileges of the PraisonAI process user. This can lead to complete system compromise, including confidentiality, integrity, and availability impacts. The CVSS score of 9.8 reflects the high potential impact and ease of exploitation.
Mitigation Recommendations
Upgrade PraisonAI to version 4.5.69 or later, where this OS command injection vulnerability has been patched. No other mitigations are specified or recommended beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-31T17:27:08.660Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d046900a160ebd9263e693
Added to database: 4/3/2026, 11:00:32 PM
Last enriched: 4/3/2026, 11:15:26 PM
Last updated: 4/4/2026, 12:37:57 AM
Views: 3
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