deepseek-ai deepseek-harness Code Mode Sandbox run_code sandbox (CVE-2026-101102) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-101102

deepseek-ai deepseek-harness Code Mode Sandbox run_code sandbox

Answer in brief

CVE-2026-101102 records a Medium severity (CVSS 5.3) vulnerability in deepseek-ai deepseek-harness Code Mode Sandbox run_code sandbox. The current sources do not mark it as known exploited. The current feed maps deepseek-ai/deepseek-harness (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 28, 2026Updated Sep 28, 2026Source checked Sep 28, 2026First seen by HOL Sep 28, 2026Material review Sep 28, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps deepseek-ai/deepseek-harness (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
deepseek-ai/deepseek-harnessgeneric	0.1.0-rc.0 \|\| 0.1.0-rc.1 \|\| 0.1.0-rc.2 \|\| 0.1.0-rc.3 \|\| 0.1.0-rc.4 \|\| 0.1.0-rc.5 \|\| 0.1.0-rc.6 \|\| 0.1.0-rc.7	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for deepseek-ai/deepseek-harness.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 28, 2026

Sources and claim methodology

Upstream source description

A vulnerability was found in deepseek-ai deepseek-harness up to 0.1.0-rc.7. Impacted is the function run_code of the component Code Mode Sandbox. The manipulation results in sandbox issue. The attack can be executed remotely. The vendor's own code, SAFETY.md, and design notes all explicitly state the worker is "containment, not a security boundary". The vendor was contacted early about this disclosure but did not respond in any way.

Quoted source text, attributed separately from HOL analysis.