PraisonAI: Origin-validation bypass (startswith prefix match) enables unauthenticated cross-site request forgery against the PraisonAI MCP HTTP server

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55532
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-25 16:16:54 UTC
Updated2026-09-09 21:07:31 UTC
DescriptionPraisonAI 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.

Risk And Classification

Primary CVSS: v3.1 7.6 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L

EPSS: 0.001280000 probability, percentile 0.027280000 (date 2026-09-10)

Problem Types: CWE-346 | CWE-352 | CWE-346 CWE-346: Origin Validation Error | CWE-352 CWE-352: Cross-Site Request Forgery (CSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L
3.1CNADECLARED7.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MervinPraison PraisonAI affected < 4.6.58 Not specified

References

ReferenceSourceLinkTags
github.com/MervinPraison/PraisonAI/commit/2f9677abb2ea68eab864ee8b6a828f... [email protected] github.com
github.com/MervinPraison/PraisonAI/security/advisories/GHSA-pvph-5j39-v8qc [email protected] github.com
github.com/MervinPraison/PraisonAI/releases/tag/v4.6.58 [email protected] github.com
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