Skip to content
Heist/ feed
Critical

WebSocket sessions do not verify TLS certificates, exposing API keys and OAuth tokens to on-path attackers

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-107685

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-107685

req_llm

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

req_llm

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:2.3:a:agentjido:req_llm:*:*:*:*:*:*:*:*"
    ],
    "repo": "https://github.com/agentjido/req_llm",
    "vendor": "agentjido",
    "modules": [
      "'Elixir.ReqLLM.Streaming.WebSocketSession.Client'",
      "'Elixir.ReqLLM.Streaming.WebSocketSession'",
      "'Elixir.ReqLLM.Providers.OpenAI.WebSocket'",
      "'Elixir.ReqLLM.OpenAI.Realtime'",
      "'Elixir.ReqLLM.Providers.OpenAICodex'"
    ],
    "product": "req_llm",
    "versions": [
      {
        "status": "affected",
        "version": "1.9.0",
        "lessThan": "1.29.0",
        "versionType": "semver"
      }
    ],
    "packageURL": "pkg:hex/req_llm",
    "packageName": "req_llm",
    "programFiles": [
      "lib/req_llm/streaming/web_socket_session/client.ex",
      "lib/req_llm/streaming/web_socket_session.ex",
      "lib/req_llm/providers/openai/web_socket.ex",
      "lib/req_llm/openai/realtime.ex",
      "lib/req_llm/providers/openai_codex.ex"
    ],
    "collectionURL": "https://repo.hex.pm",
    "defaultStatus": "unaffected",
    "programRoutines": [
      {
        "name": "'Elixir.ReqLLM.Streaming.WebSocketSession.Client':start/3"
      },
      {
        "name": "'Elixir.ReqLLM.Streaming.WebSocketSession':start_link/2"
      },
      {
        "name": "'Elixir.ReqLLM.Streaming.WebSocketSession':init/1"
      },
      {
        "name": "'Elixir.ReqLLM.Providers.OpenAI.WebSocket':start_responses_session/2"
      },
      {
        "name": "'Elixir.ReqLLM.OpenAI.Realtime':connect/2"
      },
      {
        "name": "'Elixir.ReqLLM.Providers.OpenAICodex':start_responses_session/2"
      }
    ]
  },
  {
    "cpes": [
      "cpe:2.3:a:agentjido:req_llm:*:*:*:*:*:*:*:*"
    ],
    "repo": "https://github.com/agentjido/req_llm",
    "vendor": "agentjido",
    "modules": [
      "'Elixir.ReqLLM.Streaming.WebSocketSession.Client'",
      "'Elixir.ReqLLM.Streaming.WebSocketSession'",
      "'Elixir.ReqLLM.Providers.OpenAI.WebSocket'",
      "'Elixir.ReqLLM.OpenAI.Realtime'",
      "'Elixir.ReqLLM.Providers.OpenAICodex'"
    ],
    "product": "req_llm",
    "versions": [
      {
        "status": "affected",
        "version": "a389d718640ceb2d541a8f540ab954cbf5ef8313",
        "lessThan": "c7264fc0217fbacfb5562234ff790b8e4462de76",
        "versionType": "git"
      }
    ],
    "packageURL": "pkg:github/agentjido/req_llm",
    "packageName": "agentjido/req_llm",
    "programFiles": [
      "lib/req_llm/streaming/web_socket_session/client.ex",
      "lib/req_llm/streaming/web_socket_session.ex",
      "lib/req_llm/providers/openai/web_socket.ex",
      "lib/req_llm/openai/realtime.ex",
      "lib/req_llm/providers/openai_codex.ex"
    ],
    "collectionURL": "https://github.com",
    "defaultStatus": "unaffected",
    "programRoutines": [
      {
        "name": "'Elixir.ReqLLM.Streaming.WebSocketSession.Client':start/3"
      },
      {
        "name": "'Elixir.ReqLLM.Streaming.WebSocketSession':start_link/2"
      },
      {
        "name": "'Elixir.ReqLLM.Streaming.WebSocketSession':init/1"
      },
      {
        "name": "'Elixir.ReqLLM.Providers.OpenAI.WebSocket':start_responses_session/2"
      },
      {
        "name": "'Elixir.ReqLLM.OpenAI.Realtime':connect/2"
      },
      {
        "name": "'Elixir.ReqLLM.Providers.OpenAICodex':start_responses_session/2"
      }
    ]
  }
]
Related CVEs
CVE-2026-107685

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#52690 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement