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CVE-2026-82533

CriticalCVSS 9.4 / 10
Published Sep 8, 2026·Last modified Sep 11, 2026
Affected Components(4)
deepseek-ai/deepseek-harness
dsh-v0.1.0-rc.8
deepseek-ai/deepseek-harness
dsh-v0.1.1-rc.1
deepseek-ai/deepseek-harness
dsh-v0.1.1-rc.2
1 / 2
Description

DeepSeek Harness before 0.1.2-alpha.1 contains an authentication bypass vulnerability that grants unauthenticated access to its local HTTP agent-control API by accepting a client-supplied loopback Host header in place of validating the actual TCP connection origin. On the default configuration, a confined tool-executed process can reach the loopback API without any port exposure and use it to escape its own OS sandbox, escalate to unconfined execution, and disable the approval prompt. When the port is externally reachable via tunnel, SSH forward, or reverse proxy, a remote attacker can exploit the same flaw to create sessions, execute arbitrary commands, and exfiltrate stored conversation transcripts without credentials.

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Risk Scores
Base Score
9.4

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights.

Threat Intelligence
7.7

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
1.20%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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