CVE-2026-55532
Medium
Elevated severity or exploit probability.
CVSS base
7.6
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
EPSS — probability of exploitation (30 days)
0.1%
2.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-346
Published 2026-08-25 · modified 2026-09-09
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.