GHSA-8m2g-8cgm-3vcp
DeepSeek Harness contains an authentication bypass vulnerability in local HTTP control-plane API
At a glance
- Published
- Updated
- CVE
- CVE-2026-82533
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Description
DeepSeek Harness before 0.1.2-alpha.1 contains an authentication bypass vulnerability in its local HTTP control-plane API that allows attackers to gain full agent control by supplying a spoofed Host header, as the server validates only the client-supplied Host header value rather than the actual TCP connection origin. Attackers can exploit this flaw to invoke privileged commands such as commands/execute with danger-full-access permissions, escalate session approval policies to unconfined execution, and retrieve all stored conversations without any credential or API key.
Affected packages
| Package | Versions |
|---|---|
| npm · @deepseek-ai/dsh-client-connection | introduced 0, fixed 0.1.2-alpha.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-82533 ADVISORY
- https://github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27 WEB
- https://github.com/deepseek-ai/deepseek-harness PACKAGE
- https://github.com/deepseek-ai/deepseek-harness/releases/tag/dsh-v0.1.2-alpha.1 WEB
- https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape WEB
- https://www.vulncheck.com/advisories/deepseek-harness-alpha-1-authentication-bypass-via-host-header-spoofing WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |