GHSA-xhx7-9vjr-p2h8MediumCVSS 5.4
Chainlit 2.12.0 contains a server-side request forgery vulnerability that allows unauthenticated...
🔗 CVE IDs covered (1)
📋 Description
Chainlit 2.12.0 contains a server-side request forgery vulnerability that allows unauthenticated attackers to bypass path-scoped MCP allowed_urls entries because validate_mcp_url does not reject the semicolon character. Attackers can submit MCP URLs with '..;' segments to the /mcp endpoint, causing requests to paths outside the operator's grant on origins that strip semicolon path parameters.
🔗 References (6)
- https://github.com/Chainlit/chainlit/security/advisories/GHSA-hvfh-5mj3-5f3j
- https://nvd.nist.gov/vuln/detail/CVE-2026-120492
- https://github.com/Chainlit/chainlit/blob/2.12.0/backend/chainlit/mcp.py#L199-L208
- https://github.com/Chainlit/chainlit/blob/2.12.0/backend/chainlit/mcp.py#L90-L177
- https://www.vulncheck.com/advisories/chainlit-2.12.0-ssrf-via-semicolon-path-segment-in-mcp-allowed-urls
- https://github.com/advisories/GHSA-xhx7-9vjr-p2h8