# CVE-2026-82033: DeepSeek Harness Unauthenticated RPC Command Execution

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27

## Affected products and versions

- deepseek-ai / deepseek-harness (deepseek-ai/deepseek-harness): ≥ 0; < 0.1.2-alpha.2 (affected, custom); ≥ 0; ≤ 3e24087bfaeabe40b58ba2f7b936895b8f93fe27 (affected, git). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8.4 (high); CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-306

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/deepseek-ai/deepseek-harness/releases/tag/dsh-v0.1.2-alpha.2 (CNA: VulnCheck; release-notes)

- https://github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27 (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/deepseek-harness-unauthenticated-rpc-command-execution (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-82033; retrieved 2026-11-04; source updated 2026-11-04

Revision: d7a6cc85f81e5d16aecc564fcfd2b52803fcb254c526e8ff7cb36c22619a5877

Canonical: https://y2.dev/cve/CVE-2026-82033

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