Critical severity · published Sep 14, 2026
CVE-2026-57123
PraisonAI: MCP SSE transport binds 0.0.0.0 with no authentication and no Origin validation; bundled SecurityConfig is never wired in
9.8
CVSS
0.9%
EPSS
No
On KEV
Description
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.59, ToolsMCPServer.run_sse and launch_tools_mcp_server bind to 0.0.0.0 and create /sse and /messages/ routes without invoking the available SecurityConfig authentication, origin-validation, or DNS-rebinding controls. Any reachable client can list and invoke registered tools, and a browser can target a local instance through DNS rebinding, with impact determined by the registered file, shell, and code-execution tools. This vulnerability is fixed in praisonaiagents 1.6.59.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PR
praisonaiagents · MervinPraison
< 1.6.59 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57123
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57123
github.com
https://github.com/MervinPraison/PraisonAI/commit/2adfe7e8323f6deec66925cf15a885b6238895e9
github.com
https://github.com/MervinPraison/PraisonAI/releases/tag/v4.6.59
github.com
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-x227-pf99-vffg
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