CVE-2026-55532
PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cross-site request forgery against the PraisonAI MCP HTTP server
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-346 CWE-352 |
| Vendor | mervinpraison |
| Product | praisonai |
| Published | Aug 25, 2026 |
| Last Updated | Aug 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for mervinpraison praisonai
Be the first to know when new high vulnerabilities affecting mervinpraison praisonai are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low
Affected Versions
MervinPraison / PraisonAI
< 4.6.58