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2 vulnerabilities found for DeepSeek Harness by DeepSeek
CVE-2026-82533 (GCVE-0-2026-82533)
Vulnerability from nvd – Published: 2026-09-08 16:59 – Updated: 2026-09-10 14:57 X_Open Source
VLAI
EPSS
VEX
Title
DeepSeek Harness < 0.1.2-alpha.1 Authentication Bypass via Host Header Spoofing
Summary
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.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 17:20 UTC
CWE
- CWE-807 - Reliance on Untrusted Inputs in a Security Decision
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.ox.security/blog/cve-2026-82533-deeps… | technical-descriptionexploit |
| https://github.com/deepseek-ai/deepseek-harness/r… | release-notes |
| https://github.com/deepseek-ai/deepseek-harness/c… | patch |
| https://www.vulncheck.com/advisories/deepseek-har… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| DeepSeek | DeepSeek Harness |
Affected:
0 , < 0.1.2-alpha.1
(custom)
|
Date Public
2026-08-25 00:00
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CVE-2026-82533 (GCVE-0-2026-82533)
Vulnerability from cvelistv5 – Published: 2026-09-08 16:59 – Updated: 2026-09-10 14:57 X_Open Source
VLAI
EPSS
VEX
Title
DeepSeek Harness < 0.1.2-alpha.1 Authentication Bypass via Host Header Spoofing
Summary
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.
Severity
9.6 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 17:20 UTC
CWE
- CWE-807 - Reliance on Untrusted Inputs in a Security Decision
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.ox.security/blog/cve-2026-82533-deeps… | technical-descriptionexploit |
| https://github.com/deepseek-ai/deepseek-harness/r… | release-notes |
| https://github.com/deepseek-ai/deepseek-harness/c… | patch |
| https://www.vulncheck.com/advisories/deepseek-har… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| DeepSeek | DeepSeek Harness |
Affected:
0 , < 0.1.2-alpha.1
(custom)
|
Date Public
2026-08-25 00:00
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