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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-w3fx-mc44-mf6j | Chainlit has command injection via MCP stdio transport that allows unauthenticated remote code execution |
Tue, 25 Aug 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 25 Aug 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Chainlit is a Python framework for building production-ready conversational AI applications. From 2.4.0rc0 until 2.12.0, Chainlit deployments with features.mcp.enabled set to true in .chainlit/config.toml expose the POST /mcp endpoint without requiring authentication. For stdio transport, the endpoint accepts a user-controlled fullCommand string. The validate_mcp_command() function in backend/chainlit/mcp.py checks only the executable name against config.features.mcp.stdio.allowed_executables and passes unchecked arguments to StdioServerParameters in backend/chainlit/server.py. Because npx supports the -c argument, an attacker can execute arbitrary shell commands with the privileges of the Chainlit process. If allowed_executables is unset, its None default is treated as allowing every executable. This issue is fixed in version 2.12.0. | |
| Title | Chainlit: Command injection via MCP stdio transport allows unauthenticated remote code execution | |
| Weaknesses | CWE-78 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-25T19:33:30.993Z
Reserved: 2026-05-08T16:58:28.895Z
Link: CVE-2026-45018
Updated: 2026-08-25T19:33:23.012Z
Status : Received
Published: 2026-08-25T20:16:55.720
Modified: 2026-08-25T20:16:55.720
Link: CVE-2026-45018
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OpenCVE Enrichment
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Github GHSA