CVE-2026-34938criticalCWE-693

CVE-2026-34938: critical vulnerability in MervinPraison PraisonAI

PraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code

Published · Updated

Follow this CVE+ Monitor PraisonAI+ Monitor praisonaiagents

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

33Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 10epss 13%
PraisonAI is a multi-agent teams system. Prior to version 1.5.90, execute_code() in praisonai-agents runs attacker-controlled Python inside a three-layer sandbox that can be fully bypassed by passing a str subclass with an overridden startswith() method to the _safe_getattr wrapper, achieving arbitrary OS command execution on the host. This issue has been patched in version 1.5.90.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
MervinPraison · PraisonAI
Related CVEs — MervinPraison PraisonAI

In the same product, most dangerous first.

CVE-2026-44338HIGHPraisonAI ships and generates a legacy API server with authentication disabled by default, allowing unauthenticated workflow executionEPSS 32.6%CVE-2026-61447CRITICALPraisonAI before 1.6.78 Remote Code Execution via CodeAgentEPSS 15.2%CVE-2026-48168CRITICALPraisonAI: GitHub Actions Claude workflow command injection via unquoted PR branch nameEPSS 1.5%CVE-2026-47391CRITICALPraisonAI's unauthenticated A2A official example can reach real LLM-driven `eval()` tool executionEPSS 1.5%CVE-2026-57124CRITICALPraisonAI UI MCP connect endpoint allows unauthenticated local command executionEPSS 1.0%CVE-2026-57131CRITICALpraisonai: Jobs API exposes agent-execution endpoints with no authenticationEPSS 1.0%