CVE-2026-107685

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.

CVSS

No CVSS.

References

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

Configurations

No configuration.

History

23 Oct 2026, 12:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-23 12:18

Updated : 2026-10-23 19:57

NVD link : CVE-2026-107685

Mitre link : CVE-2026-107685

CVE.ORG link : CVE-2026-107685

JSON object : View

Products Affected

No product.

CWE

CWE-295

Improper Certificate Validation

{"id": "CVE-2026-107685", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "affectedData": [{"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"}]}]}], "published": "2026-10-23T12:18:06.410", "references": [{"url": "https://cna.erlef.org/cves/CVE-2026-107685.html", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/agentjido/req_llm/commit/a389d718640ceb2d541a8f540ab954cbf5ef8313", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/agentjido/req_llm/commit/c7264fc0217fbacfb5562234ff790b8e4462de76", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/agentjido/req_llm/security/advisories/GHSA-6vww-5m28-f26v", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-107685", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "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.\n\nThe 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.\n\nThis issue affects req_llm: from 1.9.0 before 1.29.0."}], "lastModified": "2026-10-23T19:57:42.660", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}