CVE-2026-34955: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in MervinPraison PraisonAI
PraisonAI is a multi-agent teams system. Prior to version 4.5.97, SubprocessSandbox in all modes (BASIC, STRICT, NETWORK_ISOLATED) calls subprocess.run() with shell=True and relies solely on string-pattern matching to block dangerous commands. The blocklist does not include sh or bash as standalone executables, allowing trivial sandbox escape in STRICT mode via sh -c '<command>'. This issue has been patched in version 4.5.97.
AI Analysis
Technical Summary
PraisonAI, a multi-agent teams system by MervinPraison, had a vulnerability (CVE-2026-34955) in its SubprocessSandbox prior to version 4.5.97. The sandbox implementation relied on subprocess.run() with shell=True and a blocklist that did not cover sh or bash executables. This allowed attackers to bypass sandbox restrictions in STRICT mode by invoking shell commands directly, leading to OS command injection. The vulnerability is addressed by patching in version 4.5.97.
Potential Impact
Successful exploitation allows an attacker with low privileges to execute arbitrary OS commands with high impact on confidentiality, integrity, and availability. This can lead to full system compromise or escape from sandbox restrictions.
Mitigation Recommendations
A fix is available in PraisonAI version 4.5.97. Users should upgrade to this version or later to remediate the vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved by the official patch.
CVE-2026-34955: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in MervinPraison PraisonAI
Description
PraisonAI is a multi-agent teams system. Prior to version 4.5.97, SubprocessSandbox in all modes (BASIC, STRICT, NETWORK_ISOLATED) calls subprocess.run() with shell=True and relies solely on string-pattern matching to block dangerous commands. The blocklist does not include sh or bash as standalone executables, allowing trivial sandbox escape in STRICT mode via sh -c '<command>'. This issue has been patched in version 4.5.97.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PraisonAI, a multi-agent teams system by MervinPraison, had a vulnerability (CVE-2026-34955) in its SubprocessSandbox prior to version 4.5.97. The sandbox implementation relied on subprocess.run() with shell=True and a blocklist that did not cover sh or bash executables. This allowed attackers to bypass sandbox restrictions in STRICT mode by invoking shell commands directly, leading to OS command injection. The vulnerability is addressed by patching in version 4.5.97.
Potential Impact
Successful exploitation allows an attacker with low privileges to execute arbitrary OS commands with high impact on confidentiality, integrity, and availability. This can lead to full system compromise or escape from sandbox restrictions.
Mitigation Recommendations
A fix is available in PraisonAI version 4.5.97. Users should upgrade to this version or later to remediate the vulnerability. No other mitigation guidance is provided or necessary as the issue is resolved by the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-31T17:27:08.662Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d04d960a160ebd926594f3
Added to database: 4/3/2026, 11:30:30 PM
Last enriched: 4/11/2026, 9:21:18 AM
Last updated: 5/20/2026, 11:48:47 AM
Views: 106
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