CVE-2026-57139 PraisonAI MCPServer exposes unauthenticated HTTP tools/call
Unauthenticated HTTP access in PraisonAI MCPServer allows attackers to execute tools and read data using server privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57139?
CVE-2026-57139 is a critical missing authorization vulnerability in MervinPraison PraisonAI, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
PraisonAI is a multi-agent teams system. From 1.5.0 until 1.7.2, MCPServer.startHttp() in src/praisonai-ts/src/mcp/server.ts binds without a host restriction and forwards every HTTP POST request to handleRequest() without authentication or authorization. Any network client that can reach the port can call tools/list, tools/call, resources/read, or prompts/get, causing registered handlers to run with server-side credentials and process privileges or disclose registered data. An initial remediation was released in version 1.7.2.
Which versions are affected by CVE-2026-57139?
2 open source packages ship an affected version, including praisonai.
| Package | Affected | Fixed in |
|---|---|---|
praisonai npm | From 1.5.0 | 1.7.2 |
praisonai npm | From 1.5.0 | 1.7.2 |
How do I fix CVE-2026-57139?
Upgrade praisonai to 1.7.2 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-57139 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57139 exists.
Sources
Also known as GHSA-j4f3-55x4-r6q2.