---
id: "CVE-2026-82033"
kind: "vulnerability"
aliases: ["CVE-2026-82033"]
title: "DeepSeek Harness: missing authentication lets local processes run commands"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "deepseek-harness", "local-agents", "self-hosted"]
not_affected_if: ["patched-version", "web-profile-disabled"]
published_at: "2026-11-04T19:17:41+00:00"
first_seen_at: "2026-11-04T19:28:49+00:00"
updated_at: "2026-11-04T19:30:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82033", "first_seen_at": "2026-11-04T19:28:49+00:00"}]
---

# DeepSeek Harness: missing authentication lets local processes run commands

DeepSeek Harness has an unauthenticated web control interface, so any local process can create sessions and send prompts. An attacker can use the agent's shell and file tools to run arbitrary commands as the victim user, read live session traffic, and bypass tool-approval checks.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed version against the product range in the NVD entry (prior to 0.1.2-alpha.2)
- Check whether commit `3e24087` is included in the deployed build
- Check whether the web profile HTTP and WebSocket RPC interface is running on the machine

## Fix

- DeepSeek Harness: move to `0.1.2-alpha.2` or later

## Timeline

- 2026-11-04T19:28:49+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-82033

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/deepseek-harness-unauthenticated-rpc-command-execution
- [fix] Patch: github.com https://github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27
- [fix] Release notes: github.com https://github.com/deepseek-ai/deepseek-harness/releases/tag/dsh-v0.1.2-alpha.2

## From the sources

DeepSeek Harness prior to 0.1.2-alpha.2, and specifically commit 3e24087, contains a missing authentication vulnerability in its web profile HTTP and WebSocket RPC control plane, allowing any local process, including those running as a different OS user, to reach unauthenticated session methods such as session.create and session.prompt. Attackers can invoke session.prompt to trigger the agent's bash and filesystem tools, achieve arbitrary command execution as the victim user using their configured model credentials, intercept live session traffic and logs over the event mux stream, and bypass human tool-approval checks via POST /api/respond by matching only rpcId, approvalId, and sessionId values broadcast over the ungated stream.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_