What’s Vulnerable › Vulnerabilities

CVE-2026-57139: PraisonAI MCPServer exposes unauthenticated HTTP tools/call

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-17
• Weakness: CWE-306

Description

PraisonAI is a multi-agent teams system. From 1.5.0 until 1.7.2, MCPServer.startHttp() in src/praisonai-ts/src/mcp/server.ts binds without a host restriction and forwards every HTTP POST request to handleRequest() without authentication or authorization. Any network client that can reach the port can call tools/list, tools/call, resources/read, or prompts/get, causing registered handlers to run with server-side credentials and process privileges or disclose registered data. An initial remediation was released in version 1.7.2.

Affected products

• MervinPraison PraisonAI: from 1.5.0, < 1.7.2

References

• https://github.com/MervinPraison/PraisonAI/commit/709a0387853709a5e2f2c34680fa64cada252c27
• https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.60
• https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-j4f3-55x4-r6q2
• https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-j4f3-55x4-r6q2

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