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CVE-2026-57124

PraisonAI UI MCP connect endpoint allows unauthenticated local command execution

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.03%Up 0.4 points since Sep 15, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.8

PraisonAI UI MCP connect endpoint allows unauthenticated local command execution

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.

Record
CVE-2026-57124
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-78, CWE-306
Updated
2026-11-02
EUVDEUVD-2026-77598 9.8

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.

Record
EUVD-2026-77598
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-p75f-6fp4-p57w 9.8

PraisonAI: Missing Authentication for Critical Function and Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in praisonai

Unauthenticated PraisonAI UI MCP connect endpoint executes attacker-chosen local commands

Summary

PraisonAI v4.6.48 exposes the PraisonAIUI MCP client management API through the default UI host apps without authentication. A remote unauthenticated client can send POST /api/mcp/connect with a command and args field. The endpoint passes those values into the MCP stdio client, which starts the attacker-selected local process as the PraisonAI UI service user.

The issue is reachable through PraisonAI's hosted UI integration (praisonai ui, praisonai ui agents, praisonai claw, and any app using praisonai.integration.host_app.create_host_app() / build_host_app()). praisonai ui and related Typer UI commands bind to 0.0.0.0 by default.

Affected Versions

Confirmed affected:

  • praisonai v4.6.48
  • Commit tested: d5f1114aaf1a2e9f121a6e66b929149ca2201f1d
  • Tag tested: v4.6.48
  • Pinned UI dependency: aiui==0.3.121 from src/praisonai/uv.lock

Likely affected:

  • Any PraisonAI release that exposes aiui / praisonaiui create_app() through the PraisonAI UI host apps without authentication and includes the mcp dependency. I only confirmed the latest release during this audit.

Severity

Reasoning:

  • AV: the vulnerable endpoint is an HTTP API route.
  • AC: a single POST request is sufficient.
  • PR: default UI host apps do not require credentials unless opt-in auth is configured.
  • UI: no victim interaction is needed after the server is running.
  • S: code executes in the PraisonAI UI server process context.
  • C/I/A: arbitrary local command execution permits secret exfiltration, file tampering, and service disruption.

Root Cause

PraisonAI depends on MCP by default and exposes PraisonAIUI via optional UI extras:

  • src/praisonai/pyproject.toml:11 includes base dependencies.
  • src/praisonai/pyproject.toml:19 includes mcp>=1.20.0.
  • src/praisonai/pyproject.toml:25 defines the ui extra with aiui>=0.3.121,<0.4.
  • src/praisonai/pyproject.toml:197 defines the claw extra with aiui[all]>=0.3.121,<0.4.

PraisonAI's UI commands bind externally by default and launch aiui run:

  • src/praisonai/praisonai/cli/commands/ui.py:114 sets host="0.0.0.0" for praisonai ui.
  • src/praisonai/praisonai/cli/commands/ui.py:163 passes that host to aiui run.
  • src/praisonai/praisonai/cli/commands/ui.py:186, :204, and :222 also default subcommands to 0.0.0.0.
  • src/praisonai/praisonai/cli/commands/claw.py:41 defines the full dashboard command.
  • src/praisonai/praisonai/cli/commands/claw.py:93 launches aiui run with the selected host.

PraisonAI's default apps create the PraisonAIUI Starlette app without forcing authentication:

  • src/praisonai/praisonai/ui_chat/default_app.py:18 calls configure_host(...).
  • src/praisonai/praisonai/ui_chat/default_app.py:142 exports app = create_host_app().
  • src/praisonai/praisonai/claw/default_app.py:63 calls configure_host(...).
  • src/praisonai/praisonai/claw/default_app.py:128 exports app = create_host_app().
  • src/praisonai/praisonai/integration/host_app.py:174 imports praisonaiui.server.create_app.
  • src/praisonai/praisonai/integration/host_app.py:180 returns create_app().

In aiui==0.3.121, the exposed server registers the MCP routes and auth is opt-in:

  • praisonaiui/server.py:1483 defines api_mcp_connect.
  • praisonaiui/server.py:1488 reads attacker-controlled JSON.
  • praisonaiui/server.py:1491 accepts either command or url.
  • praisonaiui/server.py:1496 calls connect_mcp_server(body).
  • praisonaiui/server.py:2516 defines create_app(..., require_auth=False, ...).
  • praisonaiui/server.py:2550 adds AuthEnforcementMiddleware, but it only enforces auth when AUTH_ENFORCE=true.
  • praisonaiui/server.py:2769 registers /api/mcp/servers.
  • praisonaiui/server.py:2770 registers /api/mcp/connect.

The MCP feature converts the request body into a local process launch:

-…

Record
GHSA-p75f-6fp4-p57w
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-78, CWE-306
Updated
2026-11-02
NVD 9.8

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.

Record
CVE-2026-57124
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-78, CWE-306
Updated
2026-11-02
OSV 9.8

PraisonAI UI MCP connect endpoint allows unauthenticated local command execution

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.

Record
CVE-2026-57124
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-306, CWE-78
Updated
2026-11-02
OSVGHSA-p75f-6fp4-p57w 9.8

PraisonAI: Missing Authentication for Critical Function and Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in praisonai

Unauthenticated PraisonAI UI MCP connect endpoint executes attacker-chosen local commands

Summary

PraisonAI v4.6.48 exposes the PraisonAIUI MCP client management API through the default UI host apps without authentication. A remote unauthenticated client can send POST /api/mcp/connect with a command and args field. The endpoint passes those values into the MCP stdio client, which starts the attacker-selected local process as the PraisonAI UI service user.

The issue is reachable through PraisonAI's hosted UI integration (praisonai ui, praisonai ui agents, praisonai claw, and any app using praisonai.integration.host_app.create_host_app() / build_host_app()). praisonai ui and related Typer UI commands bind to 0.0.0.0 by default.

Affected Versions

Confirmed affected:

  • praisonai v4.6.48
  • Commit tested: d5f1114aaf1a2e9f121a6e66b929149ca2201f1d
  • Tag tested: v4.6.48
  • Pinned UI dependency: aiui==0.3.121 from src/praisonai/uv.lock

Likely affected:

  • Any PraisonAI release that exposes aiui / praisonaiui create_app() through the PraisonAI UI host apps without authentication and includes the mcp dependency. I only confirmed the latest release during this audit.

Severity

Reasoning:

  • AV: the vulnerable endpoint is an HTTP API route.
  • AC: a single POST request is sufficient.
  • PR: default UI host apps do not require credentials unless opt-in auth is configured.
  • UI: no victim interaction is needed after the server is running.
  • S: code executes in the PraisonAI UI server process context.
  • C/I/A: arbitrary local command execution permits secret exfiltration, file tampering, and service disruption.

Root Cause

PraisonAI depends on MCP by default and exposes PraisonAIUI via optional UI extras:

  • src/praisonai/pyproject.toml:11 includes base dependencies.
  • src/praisonai/pyproject.toml:19 includes mcp>=1.20.0.
  • src/praisonai/pyproject.toml:25 defines the ui extra with aiui>=0.3.121,<0.4.
  • src/praisonai/pyproject.toml:197 defines the claw extra with aiui[all]>=0.3.121,<0.4.

PraisonAI's UI commands bind externally by default and launch aiui run:

  • src/praisonai/praisonai/cli/commands/ui.py:114 sets host="0.0.0.0" for praisonai ui.
  • src/praisonai/praisonai/cli/commands/ui.py:163 passes that host to aiui run.
  • src/praisonai/praisonai/cli/commands/ui.py:186, :204, and :222 also default subcommands to 0.0.0.0.
  • src/praisonai/praisonai/cli/commands/claw.py:41 defines the full dashboard command.
  • src/praisonai/praisonai/cli/commands/claw.py:93 launches aiui run with the selected host.

PraisonAI's default apps create the PraisonAIUI Starlette app without forcing authentication:

  • src/praisonai/praisonai/ui_chat/default_app.py:18 calls configure_host(...).
  • src/praisonai/praisonai/ui_chat/default_app.py:142 exports app = create_host_app().
  • src/praisonai/praisonai/claw/default_app.py:63 calls configure_host(...).
  • src/praisonai/praisonai/claw/default_app.py:128 exports app = create_host_app().
  • src/praisonai/praisonai/integration/host_app.py:174 imports praisonaiui.server.create_app.
  • src/praisonai/praisonai/integration/host_app.py:180 returns create_app().

In aiui==0.3.121, the exposed server registers the MCP routes and auth is opt-in:

  • praisonaiui/server.py:1483 defines api_mcp_connect.
  • praisonaiui/server.py:1488 reads attacker-controlled JSON.
  • praisonaiui/server.py:1491 accepts either command or url.
  • praisonaiui/server.py:1496 calls connect_mcp_server(body).
  • praisonaiui/server.py:2516 defines create_app(..., require_auth=False, ...).
  • praisonaiui/server.py:2550 adds AuthEnforcementMiddleware, but it only enforces auth when AUTH_ENFORCE=true.
  • praisonaiui/server.py:2769 registers /api/mcp/servers.
  • praisonaiui/server.py:2770 registers /api/mcp/connect.

The MCP feature converts the request body into a local process launch:

-…

Record
GHSA-p75f-6fp4-p57w
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-306, CWE-78
Updated
2026-11-02
OSVPYSEC-2026-3517 9.8

PraisonAI: Missing Authentication for Critical Function and Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in praisonai

Unauthenticated PraisonAI UI MCP connect endpoint executes attacker-chosen local commands

Summary

PraisonAI v4.6.48 exposes the PraisonAIUI MCP client management API through the default UI host apps without authentication. A remote unauthenticated client can send POST /api/mcp/connect with a command and args field. The endpoint passes those values into the MCP stdio client, which starts the attacker-selected local process as the PraisonAI UI service user.

The issue is reachable through PraisonAI's hosted UI integration (praisonai ui, praisonai ui agents, praisonai claw, and any app using praisonai.integration.host_app.create_host_app() / build_host_app()). praisonai ui and related Typer UI commands bind to 0.0.0.0 by default.

Affected Versions

Confirmed affected:

  • praisonai v4.6.48
  • Commit tested: d5f1114aaf1a2e9f121a6e66b929149ca2201f1d
  • Tag tested: v4.6.48
  • Pinned UI dependency: aiui==0.3.121 from src/praisonai/uv.lock

Likely affected:

  • Any PraisonAI release that exposes aiui / praisonaiui create_app() through the PraisonAI UI host apps without authentication and includes the mcp dependency. I only confirmed the latest release during this audit.

Severity

Reasoning:

  • AV: the vulnerable endpoint is an HTTP API route.
  • AC: a single POST request is sufficient.
  • PR: default UI host apps do not require credentials unless opt-in auth is configured.
  • UI: no victim interaction is needed after the server is running.
  • S: code executes in the PraisonAI UI server process context.
  • C/I/A: arbitrary local command execution permits secret exfiltration, file tampering, and service disruption.

Root Cause

PraisonAI depends on MCP by default and exposes PraisonAIUI via optional UI extras:

  • src/praisonai/pyproject.toml:11 includes base dependencies.
  • src/praisonai/pyproject.toml:19 includes mcp>=1.20.0.
  • src/praisonai/pyproject.toml:25 defines the ui extra with aiui>=0.3.121,<0.4.
  • src/praisonai/pyproject.toml:197 defines the claw extra with aiui[all]>=0.3.121,<0.4.

PraisonAI's UI commands bind externally by default and launch aiui run:

  • src/praisonai/praisonai/cli/commands/ui.py:114 sets host="0.0.0.0" for praisonai ui.
  • src/praisonai/praisonai/cli/commands/ui.py:163 passes that host to aiui run.
  • src/praisonai/praisonai/cli/commands/ui.py:186, :204, and :222 also default subcommands to 0.0.0.0.
  • src/praisonai/praisonai/cli/commands/claw.py:41 defines the full dashboard command.
  • src/praisonai/praisonai/cli/commands/claw.py:93 launches aiui run with the selected host.

PraisonAI's default apps create the PraisonAIUI Starlette app without forcing authentication:

  • src/praisonai/praisonai/ui_chat/default_app.py:18 calls configure_host(...).
  • src/praisonai/praisonai/ui_chat/default_app.py:142 exports app = create_host_app().
  • src/praisonai/praisonai/claw/default_app.py:63 calls configure_host(...).
  • src/praisonai/praisonai/claw/default_app.py:128 exports app = create_host_app().
  • src/praisonai/praisonai/integration/host_app.py:174 imports praisonaiui.server.create_app.
  • src/praisonai/praisonai/integration/host_app.py:180 returns create_app().

In aiui==0.3.121, the exposed server registers the MCP routes and auth is opt-in:

  • praisonaiui/server.py:1483 defines api_mcp_connect.
  • praisonaiui/server.py:1488 reads attacker-controlled JSON.
  • praisonaiui/server.py:1491 accepts either command or url.
  • praisonaiui/server.py:1496 calls connect_mcp_server(body).
  • praisonaiui/server.py:2516 defines create_app(..., require_auth=False, ...).
  • praisonaiui/server.py:2550 adds AuthEnforcementMiddleware, but it only enforces auth when AUTH_ENFORCE=true.
  • praisonaiui/server.py:2769 registers /api/mcp/servers.
  • praisonaiui/server.py:2770 registers /api/mcp/connect.

The MCP feature converts the request body into a local process launch:

-…

Record
PYSEC-2026-3517
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
praisonai
PyPI
 through 4.6.48
4.6.59
praisonai
PyPI
 before 4.6.59, plus listed versions
0.0.10.0.100.0.110.0.120.0.13
Show 45 moreShow less
0.0.140.0.150.0.160.0.170.0.180.0.190.0.20.0.200.0.210.0.220.0.230.0.240.0.250.0.260.0.270.0.280.0.290.0.30.0.300.0.310.0.320.0.330.0.340.0.350.0.360.0.370.0.380.0.390.0.40.0.400.0.410.0.420.0.430.0.440.0.450.0.460.0.470.0.480.0.490.0.50.0.500.0.520.0.530.0.540.0.55
4.6.59

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-57124 is a critical vulnerability (CVSS 9.8) in Mervinpraison Praisonai, published June 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.03%, the 63rd percentile. Fixed in praisonai 4.6.59.

References

This page doesn't list everything

Left out here: 699 versions and the rest of 3 source descriptions. The JSON record has them.

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