CVE-2026-57124 PraisonAI UI MCP connect endpoint allows unauthenticated local command execution
Unauthenticated attackers can execute arbitrary local commands via the MCP connect endpoint in PraisonAI UI due to missing authentication and input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57124?
CVE-2026-57124 is a critical command injection vulnerability in MervinPraison PraisonAI, published on 14 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. Prior to 4.6.59, the default UI host applications expose POST /api/mcp/connect without mandatory authentication and accept caller-controlled command and args values that PraisonAIUI passes to StdioMCPClient to start a local process. Because the UI commands bind to 0.0.0.0 by default, a reachable unauthenticated client can execute commands as the UI service account even when the MCP handshake later fails. This vulnerability is fixed in 4.6.59.
Which versions are affected by CVE-2026-57124?
3 open source packages ship an affected version, including praisonai.
| Package | Affected | Fixed in |
|---|---|---|
praisonai PyPI | All versions | 4.6.59 |
praisonai PyPI | All versions | 4.6.59 |
praisonai PyPI | All versions | 4.6.59 |
How do I fix CVE-2026-57124?
Upgrade praisonai to 4.6.59 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-57124 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57124 exists.
Sources
Also known as GHSA-p75f-6fp4-p57w, PYSEC-2026-3517.