CVE-2026-82533
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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.6
- CVSS vector
- 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
- EPSS probability
- 0.42%
- CWE
- CWE-807
- Published
- 2026-09-08
- Last modified
- 2026-09-08
Affected products
- DeepSeek DeepSeek Harness
Weakness type
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