Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-107685.html
- https://github.com/agentjido/req_llm/commit/a389d718640ceb2d541a8f540ab954cbf5ef
- https://github.com/agentjido/req_llm/commit/c7264fc0217fbacfb5562234ff790b8e4462
- https://github.com/agentjido/req_llm/security/advisories/GHSA-6vww-5m28-f26v
- https://osv.dev/vulnerability/EEF-CVE-2026-107685
FAQ
What is CVE-2026-107685?
CVE-2026-107685 is a documented vulnerability. 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 authorizatio...
How severe is CVE-2026-107685?
CVSS scoring is not yet available for CVE-2026-107685. Check NVD for updates.
Is there a patch for CVE-2026-107685?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.