Critical 9.1Published Oct 23, 2026

CVE-2026-107685WebSocket sessions do not verify TLS certificates, exposing API keys and OAuth tokens to on-path attackers

Updated under an hour ago (Oct 27, 2026, 7:20 PM ET)

Does this affect you?

It affects agentjido req_llm. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.27%, higher than 20% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for agentjido req_llm

Exploited in the last 30 days

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: 9.1 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-295
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.27% (percentile 20)
Assigned by: EEF
NVD analysis: Deferred
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

agentjido req_llm agentjido:req_llm	from 1.9.0 before 1.29.0	CNA record

References

References

https://github.com/agentjido/req_llm/security/advisories/GHSA-6vww-5m28-f26v	vendor-advisory, related
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.