HighVulnerabilityLLM-specific

CVE-2026-107685: req_llm WebSocket streaming client accepts untrusted TLS certificates

Source: NVD(opens in a new tab)
Identifier: CVE-2026-107685
Published: October 23, 2026
Record updated: October 23, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.

Summary

Improper certificate validation in the WebSocket streaming client of agentjido req_llm lets an on-path attacker read and modify OpenAI WebSocket sessions, including the authorization bearer token, when the client accepts an untrusted TLS certificate. ReqLLM.Streaming.WebSocketSession.Client.start/3 starts WebSockex without TLS options, so it defaults to verify: :verify_none, and the option allowlist drops caller-supplied cacerts or ssl_options. The OpenAI Responses, Realtime, and Codex WebSocket paths are affected, while HTTP streaming through Finch and the HTTP/2 session through Mint are not. Versions 1.9.0 before 1.29.0 are affected.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 23, 2026.
Disclosure date: October 23, 2026

Weaknesses and techniques

Weakness (CWE): CWE-295

Affected

Vendors: OpenAI

Classification

Attack type: Other
Attack sophistication: Advanced
AI component targeted: API
Impact: Confidentiality,
Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-107685

First tracked: October 23, 2026 at 02:07 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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