Answer in brief
CVE-2026-82533 records a Critical severity (CVSS 9.6) vulnerability in DeepSeek Harness < 0.1.2-alpha.1 Authentication Bypass via Host Header Spoofing. The current sources do not mark it as known exploited. The current feed maps DeepSeek/DeepSeek Harness (generic), @deepseek-ai/dsh-client-connection (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps DeepSeek/DeepSeek Harness (generic), @deepseek-ai/dsh-client-connection (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| DeepSeek/DeepSeek Harnessgeneric | >=0 <0.1.2-alpha.1 | 0.1.2-alpha.1 |
| @deepseek-ai/dsh-client-connectionnpm | <0.1.2-alpha.1 | 0.1.2-alpha.1 |
Published upstream
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.