EUVD-2026-67821

Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation...

CVE-2026-82290 Chainlit Feedback Endpoints Missing Ownership Validation

Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation...

CVE-2026-82290: Authorization Bypass Through User-Controlled Key

Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation...

PT-2026-83313

Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation...

CVE-2026-45018

creationtimestamp| type| source ---|---|--- 2026-08-25 20:35:07+00:00| published-proof-of-concept| https://github.com/Chainlit/chainlit/security/advisories/GHSA-w3fx-mc44-mf6j 2026-08-25 22:08:11+00:00| seen| https://bsky.app/profile/stemshop.bsky.social/post/3mtwtfdjmag2e 2026-08-26...

CVE-2026-45019

creationtimestamp| type| source ---|---|--- 2026-08-25 20:35:05+00:00| published-proof-of-concept| https://github.com/Chainlit/chainlit/security/advisories/GHSA-hvfh-5mj3-5f3j 2026-08-25 22:31:31+00:00| seen| https://gist.github.com/alon710/cd9e29ae1307bd41a5c652b5662f31b2 2026-08-31...

Command Injection

Overview chainlit is a Build Conversational AI. Affected versions of this package are vulnerable to Command Injection through the validatemcpcommand flow in backend/chainlit/mcp.py and the /mcp stdio connect handler. An attacker can execute arbitrary OS commands on the server by sending a POST /m...

CVE-2026-45019

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 sse and streamable-http...

CVE-2026-45018

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...

Chainlist has SSRF via MCP SSE and streamable-http transports that allows unauthenticated internal network access

Am I affected? Only if your deployment sets features.mcp.enabled = true in .chainlit/config.toml. MCP has been disabled by default since v2.7.0, so most Chainlit deployments are not affected. No authentication is required: /mcp is reachable by any client that can open a session. Summary When MCP ...

Server-side Request Forgery (SSRF)

Overview chainlit is a Build Conversational AI. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the /mcp connect handling in backend/chainlit/server.py. An attacker can force the server to make outbound HTTP requests to arbitrary internal or external URLs ...

GHSA-HVFH-5MJ3-5F3J Chainlist has SSRF via MCP SSE and streamable-http transports that allows unauthenticated internal network access

Am I affected? Only if your deployment sets features.mcp.enabled = true in .chainlit/config.toml. MCP has been disabled by default since v2.7.0, so most Chainlit deployments are not affected. No authentication is required: /mcp is reachable by any client that can open a session. Summary When MCP ...

CVE-2026-45019

Chainlit (a Python framework for building conversational AI applications) is affected by an SSRF vulnerability in its MCP integration. From version 2.4.0rc0 to 2.12.0 , deployments with features.mcp.enabled = true expose the POST /mcp endpoint without authentication. For SSE and streamable-http t...

CVE-2026-45019 Chainlit: SSRF via MCP SSE and streamable-http transports allows unauthenticated internal network access

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 sse and streamable-http...

CVE-2026-45019 Chainlit: SSRF via MCP SSE and streamable-http transports allows unauthenticated internal network access

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 sse and streamable-http...

CVE-2026-45019 Chainlit: SSRF via MCP SSE and streamable-http transports allows unauthenticated internal network access

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 sse and streamable-http...

GHSA-W3FX-MC44-MF6J Chainlit has command injection via MCP stdio transport that allows unauthenticated remote code execution

Am I affected? Only if your deployment sets features.mcp.enabled = true in .chainlit/config.toml. MCP has been disabled by default since v2.7.0, so most Chainlit deployments are not affected. No authentication is required: /mcp is reachable by any client that can open a session. Summary When MCP ...

Chainlit has command injection via MCP stdio transport that allows unauthenticated remote code execution

Am I affected? Only if your deployment sets features.mcp.enabled = true in .chainlit/config.toml. MCP has been disabled by default since v2.7.0, so most Chainlit deployments are not affected. No authentication is required: /mcp is reachable by any client that can open a session. Summary When MCP ...

CVE-2026-45018 Chainlit: Command injection via MCP stdio transport allows unauthenticated remote code execution

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...

EUVD-2026-65737

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...