CVE-2026-55532
High
Description
PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, MCP HTTP Stream _validate_origin uses request_origin.startswith(allowed), allowing the attacker-controlled localhost.attacker.com HTTP origin to satisfy the localhost allowlist. A webpage can send Content-Type: text/plain requests without preflight and invoke tools/call without an API key, including file writes that persist agent instructions. This issue is fixed in version 4.6.58.
SeverityHigh
CVSS7.6
Exploit probability—
ProductPraisonai
PublishedAug 25, 2026
First seenAug 25, 2026
How to fix
Update
- praisonai4.6.58 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| praisonaiPyPI | v < 4.6.58 | 4.6.58 |
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