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CVE-2026-51866 – Remote Code Execution via Skill Upload – DB-GPT 0.7.5 and 0.8.0

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Summary

CVE-2026-51866 is a critical code injection / remote code execution vulnerability in DB-GPT, an open-source AI data agent framework developed by eosphoros-ai. A skill script uploaded through the /api/v1/skills/upload endpoint can later be executed via the /api/v1/chat/react-agent flow, allowing an attacker to run arbitrary code on the host server. The issue affects DB-GPT versions 0.7.5 and 0.8.0 and carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: SkillManager.execute_skill_script_file reads the content of a previously uploaded skill script, wraps it as executable Python code, and launches it via asyncio.create_subprocess_exec() without adequate sanitization, isolation, or integrity verification.
  • Trigger conditions: An attacker first uploads a malicious skill package/script through the legitimate /api/v1/skills/upload route, then triggers execution of that skill by invoking the /api/v1/chat/react-agent endpoint, which selects and runs the uploaded script with the privileges of the application server.
  • Attack vector: Network-based (AV:N), no privileges required (PR:N), and no user interaction needed (UI:N) — exploitation uses only the application’s own documented upload and chat/agent APIs.
  • Impact: Full compromise of confidentiality, integrity, and availability, since the vulnerability results in arbitrary code execution on the host running DB-GPT.

Affected software

  • DB-GPT version 0.7.5
  • DB-GPT version 0.8.0 (including pre-release build 0.8.0rc6)

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade DB-GPT to a release that includes the fix merged via pull request #3071, which adds execution gates to SkillManager.execute_script(), SkillManager.get_skill_resource(), and SkillManager.execute_skill_script_file() to block execution of scripts uploaded to the skills/user/ directory.
  • If immediate upgrade is not possible: Set the environment variable DBGPT_DISABLE_PERSONAL_SKILL_SCRIPT_EXECUTION=true to explicitly disable execution of personal/uploaded skill scripts while retaining built-in skill functionality.
  • Additional hardening: Restrict network exposure of DB-GPT instances (do not expose the skill-upload and chat/react-agent APIs directly to the internet), enforce authentication and access controls on the /api/v1/skills/upload endpoint, and audit any previously uploaded skills for malicious content.

References

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