Vulnerability · Published Sep 14, 2026 · Assigned by GitHub_M
CVE-2026-57123PraisonAI: MCP SSE transport binds 0.0.0.0 with no authentication and no Origin validation; bundled SecurityConfig is never wired in
Critical 9.8
In plain English
A critical-severity missing authentication in praisonaiagents from MervinPraison. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.59, ToolsMCPServer.run_sse and launch_tools_mcp_server bind to 0.0.0.0 and create /sse and /messages/ routes without invoking the available SecurityConfig authentication, origin-validation, or DNS-rebinding controls. Any reachable client can list and invoke registered tools, and a browser can target a local instance through DNS rebinding, with impact determined by the registered file, shell, and code-execution tools. This vulnerability is fixed in praisonaiagents 1.6.59.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | praisonaiagents | 1.6.59 | GHSA-x227-pf99-vffg |
| PyPI | praisonaiagents | 1.6.59 | PYSEC-2026-3536 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MervinPraison | praisonaiagents | < 1.6.59 |
Weakness: CWE-306, CWE-350, CWE-1327 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H