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Vulnerability details

CVE-2026-57112

MervinPraison PraisonAIMervinPraison praisonaiagents

PraisonAI ToolsMCPServer legacy SSE transport accepts attacker Host/Origin and exposes registered tools

CVSS 3.1
8.3High

Official description

PraisonAI is a multi-agent teams system. From praisonaiagents 0.6.0 until 1.6.59 and PraisonAI 3.10.0 until 4.6.59, ToolsMCPServer.run_sse() in src/praisonai-agents/praisonaiagents/mcp/mcp_server.py mounts SseServerTransport on the legacy /sse and /messages/ endpoints without default Host, Origin, or authentication enforcement. A malicious website can use DNS rebinding against a reachable local or internal SSE server, supply attacker-controlled Host and Origin headers, enumerate registered tools, and invoke them with the server user's privileges. The Streamable HTTP transport rejects the same hostile Origin, which isolates the flaw to the legacy SSE wrapper. An initial remediation was released in praisonaiagents 1.6.59 and PraisonAI 4.6.59.

CVSS scores

ScoreVersionSourceVector
8.3High 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
MervinPraison PraisonAI >= 3.10.0, < 4.6.59 CVEProject cvelistV5 (CNA)
MervinPraison praisonaiagents >= 0.6.0, < 1.6.59 CVEProject cvelistV5 (CNA)

References and advisories

3
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Details

Published
2026-09-15
Last updated
2026-09-16
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.22%
Probability of exploitation in 30 days
13.1%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
Proof of concept
Technical impact
Total

Weaknesses (CWE)

  • CWE-306
    Missing Authentication for Critical Function
  • CWE-346
    Origin Validation Error
  • CWE-862
    Missing Authorization