# CVE-2026-55529

## Summary

- **CVE ID:** CVE-2026-55529
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N)
- **CWE:** CWE-306, CWE-346
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 27, 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.

## Affected Products

- MervinPraison — PraisonAI (< 4.6.58)

## References

- [CNA](https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wj6g-v78p-6fx3)
- [CNA](https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1)
- [CNA](https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.12%
- **EPSS Percentile:** 2.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._