EUVD-2026-77598
GHSA-p75f-6fp4-p57w
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Default 0.0.0.0 bind + no auth makes a single POST sufficient (AV:N/AC:L/PR:N/UI:N); arbitrary command execution as the UI user yields full C/I/A within the same process authority (S:U).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
6DescriptionCVE.org
PraisonAI is a multi-agent teams system. Prior to 4.6.59, the default UI host applications expose POST /api/mcp/connect without mandatory authentication and accept caller-controlled command and args values that PraisonAIUI passes to StdioMCPClient to start a local process. Because the UI commands bind to 0.0.0.0 by default, a reachable unauthenticated client can execute commands as the UI service account even when the MCP handshake later fails. This vulnerability is fixed in 4.6.59.
AnalysisAI
Unauthenticated OS command execution in PraisonAI's UI host applications (all versions before 4.6.59, confirmed on 4.6.48) lets remote attackers run arbitrary local commands as the PraisonAI UI service account by sending a single POST to /api/mcp/connect with attacker-chosen command and args values, because those values are handed to the MCP stdio client which spawns a local process. The default 'praisonai ui', 'praisonai ui agents' and 'praisonai claw' commands bind to 0.0.0.0 with no authentication, so the issue is exploitable against default configurations (CVSS 3.1 9.8, AV:N/AC:L/PR:N/UI:N, CWE-78) without credentials or user interaction, and the process is spawned even if the subsequent MCP handshake fails. …
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Vulnerability AssessmentAI
| Exploitation | Requires that a PraisonAI UI host application is running - specifically 'praisonai ui', 'praisonai ui agents', 'praisonai claw', or any app built via praisonai.integration.host_app.create_host_app()/build_host_app() - and that the UI 'ui'/'claw' extra (aiui>=0.3.121) plus the default mcp dependency are installed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue, and unusually for the 9.8 cohort the score is well-calibrated rather than inflated. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to PraisonAI 4.6.59 or later (for example 'pip install --upgrade "praisonai>=4.6.59"'), which is the vendor-released patch containing commit 2adfe7e8323f6deec66925cf15a885b6238895e9 and the v4.6.59 release tag; see the advisory at https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-p75f-6fp4-p57w, the commit at https://github.com/MervinPraison/PraisonAI/commit/2adfe7e8323f6deec66925cf15a885b6238895e9, and the release at https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.59. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every PraisonAI deployment and flag any instance below 4.6.59, prioritizing those running 'praisonai ui', 'praisonai ui agents', or 'praisonai claw' on default 0.0.0.0 bindings; immediately block network access to those services via firewall, security group, or localhost-only binding, or take them offline if isolation is not possible, and begin reviewing logs for POST requests to /api/mcp/connect and for unexpected child processes. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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