Vulnerability details

Improper Certificate Validation vulnerability in the WebSocket streaming client in agentjido req_llm allows an on-path attacker to read and modify OpenAI WebSocket sessions, including the authorization bearer token, via a TLS certificate the client does not trust. ReqLLM.Streaming.WebSocketSession.Client.start/3 in lib/req_llm/streaming/web_socket_session/client.ex starts WebSockex without TLS options, and WebSockex defaults to insecure: true, which connects with verify: :verify_none. The option allowlist also drops any caller-supplied cacerts or ssl_options, so an application cannot turn verification on. The OpenAI Responses, Realtime, and Codex WebSocket paths reach this client and send the API key or OAuth access token in the authorization header. HTTP streaming through Finch and the HTTP/2 duplex session through Mint verify certificates and are not affected. This issue affects req_llm: from 1.9.0 before 1.29.0.

• https://cna.erlef.org/cves/CVE-2026-107685.html related
• https://osv.dev/vulnerability/EEF-CVE-2026-107685 related
• https://github.com/agentjido/req_llm/commit/a389d718640ceb2d541a8f540ab954cbf5ef8313 related
• https://github.com/agentjido/req_llm/commit/c7264fc0217fbacfb5562234ff790b8e4462de76 patch
• https://github.com/agentjido/req_llm/security/advisories/GHSA-6vww-5m28-f26v vendor-advisoryrelated