CVE-2026-86099

Chainlit through 2.12.0 fails to validate the client-supplied socket.io sessionId parameter, allowing unauthenticated attackers to traverse filesystem paths by injecting absolute or relative path sequences. Attackers can craft malicious sessionId values that escape the upload directory and...

CVE-2026-86099

Chainlit versions through 2.12.0 fail to validate the client-supplied socket.io sessionId parameter, enabling unauthenticated attackers to perform path traversal by injecting absolute or relative path sequences. Maliciously crafted sessionId values can escape the upload directory and recursively ...

EUVD-2026-74908

Chainlit through 2.12.0 fails to validate the client-supplied socket.io sessionId parameter, allowing unauthenticated attackers to traverse filesystem paths by injecting absolute or relative path sequences. Attackers can craft malicious sessionId values that escape the upload directory and...

CVE-2026-86099 Chainlit through 2.12.0 Path Traversal via socket.io sessionId

Chainlit through 2.12.0 fails to validate the client-supplied socket.io sessionId parameter, allowing unauthenticated attackers to traverse filesystem paths by injecting absolute or relative path sequences. Attackers can craft malicious sessionId values that escape the upload directory and...

CVE-2026-86099 Chainlit through 2.12.0 Path Traversal via socket.io sessionId

Chainlit through 2.12.0 fails to validate the client-supplied socket.io sessionId parameter, allowing unauthenticated attackers to traverse filesystem paths by injecting absolute or relative path sequences. Attackers can craft malicious sessionId values that escape the upload directory and...

PT-2026-89000

Chainlit through 2.12.0 fails to validate the client-supplied socket.io sessionId parameter, allowing unauthenticated attackers to traverse filesystem paths by injecting absolute or relative path sequences. Attackers can craft malicious sessionId values that escape the upload directory and...

Authorization Bypass Through User-Controlled Key

Overview chainlit is a Build Conversational AI. Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the feedback PUT and DELETE endpoints in backend/chainlit/server.py. An authenticated attacker can modify or delete other users’ feedback by...

CVE-2026-82290

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

Chainlit through version 2.12.0 fails to validate ownership of feedback records in its PUT and DELETE endpoints. The root cause is a missing ownership check, allowing authenticated attackers to delete or modify other users' feedback by supplying arbitrary feedback identifiers. The practical conse...

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-2026-45018

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...

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...

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...

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 ...

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...