CVE-2026-55529
Low
No strong exploitation signal.
CVSS base
6.9
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
EPSS — probability of exploitation (30 days)
0.1%
2.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-306
Published 2026-08-25 · modified 2026-09-09
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.
References
- https://github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828fd0141612e1
- https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58
- https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wj6g-v78p-6fx3
- https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-wj6g-v78p-6fx3