CVE-2026-55529

MediumCVSS 6.9/10Last modified Sep 9, 2026

Description

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream _validate_origin method accepts request_origin.startswith(allowed), so the attacker-controlled localhost.evil.example HTTP origin matches the localhost allowlist. Without an API key, a malicious webpage can submit tools/call requests to the local MCP server and execute exposed tools. This issue is fixed in version 4.6.58.

Metrics

CVSS 3.1 6.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N

Weakness enumeration

CWE-306CWE-346

Affected software

No affected versions have been published.

Timeline

Published
Aug 25, 2026
Last modified
Sep 9, 2026
NVD status
Deferred

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CVE-2026-55529: Medium severity, CVSS 6.9 | Vulnix