Riskcovery

CVE-2026-55532

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

State
Published
Severity
7.6 High
Published
Aug 25, 2026
Updated
Aug 25, 2026
Reserved
Jun 16, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.6 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:LGitHub_M

Weaknesses

  • CWE-346 Origin Validation Error
  • CWE-352 Cross-Site Request Forgery (CSRF)

Affected Products

ProductVersions
PraisonAIMervinPraison
  • < 4.6.58Affected

References

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