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TI-2026-40075 Aliases CVE-2026-55529GHSA-wj6g-v78p-6fx3

Missing authentication in MervinPraison PraisonAI

Priority MEDIUM 64CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00175 7th percentileScored 2026-11-07
Fix Fixed PraisonAI (MervinPraison): 4.6.58PraisonAI (PyPI): 4.6.58

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MervinPraisonPraisonAIbefore 4.6.584.6.58Patch availableCNA
—PraisonAI (PyPI)before 4.6.584.6.58Patch availableGHSA-wj6g-v78p-6fx3
  • PraisonAI VendorMervinPraison Affected before 4.6.58 Fixed in 4.6.58 Patch available CNA
  • PraisonAI (PyPI) Vendor— Affected before 4.6.58 Fixed in 4.6.58 Patch available GHSA-wj6g-v78p-6fx3

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:*——MervinPraison
  • cpe:2.3:a:praison:praisonai:*:*:*:*:*:*:*:* Versions — — ·MervinPraison

Remediation

  • Fix · CNA PraisonAI (MervinPraison) Fixed in 4.6.58
  • Fix · GHSA-wj6g-v78p-6fx3 PraisonAI (PyPI) Fixed in 4.6.58 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55529
  2. 2026-10-03 Alias added: GHSA-wj6g-v78p-6fx3

References

Other 4

  • TI-2026-79619 Missing authentication in PraisonAI AgentOS exposes agent chat CVSS 3.1CRITICAL 9.8
  • TI-2026-71236 Missing access control in PraisonAI AgentTeam exposes agent endpoints CVSS 3.1CRITICAL 9.8
  • TI-2026-44052 PraisonAI before 1.6.78 Remote Code Execution via CodeAgent CVSS 4.0CRITICAL 10.0
  • TI-2026-41123 praisonai-platform 0.1.4 still boots on the hardcoded JWT secret dev-secret-change-me (default-open production guard) CVSS 3.1CRITICAL 9.8
  • TI-2026-41122 praisonai-platform: default JWT signing secret 'dev-secret-change-me' enables token forgery CVSS 3.1CRITICAL 9.8
  • TI-2026-41118 PraisonAI MCPServer exposes unauthenticated HTTP tools/call CVSS 3.1CRITICAL 9.8
See all 177 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences