CVE-2026-82033: deepseek-harness · Missing Authentication
Affects deepseek-harnessSource CVE Database V5
Not known to be exploited · CVSS 8.6 High : upgrade to 0.1.2-alpha.2 soon.
Data as of 4 Nov 2026, 21:42 UTC
Thin evidence
One scorer or none| CNA (VulnCheck) | CVSS 4.0 | 8.6 |
|---|---|---|
| CNA (VulnCheck) | CVSS 3.1 | 8.4 |
- Patch
- Available – fixed in 0.1.2-alpha.2
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 4 Nov 2026.
What to do
Upgrade deepseek-harness to 0.1.2-alpha.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| deepseek-aideepseek-harness | Affected
| Fixed in
|
GitHubdeepseek-harnesspkg:github/deepseek-harnessOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in deepseek-harness version 0.1.2-alpha.2. Users should upgrade to this version to remediate the vulnerability. No additional mitigation steps are indicated as the issue is resolved by this official fix.
Description
DeepSeek Harness prior to 0.1.2-alpha.2, and specifically commit 3e24087, contains a missing authentication vulnerability in its web profile HTTP and WebSocket RPC control plane, allowing any local process, including those running as a different OS user, to reach unauthenticated session methods such as session.create and session.prompt. Attackers can invoke session.prompt to trigger the agent's bash and filesystem tools, achieve arbitrary command execution as the victim user using their configured model credentials, intercept live session traffic and logs over the event mux stream, and bypass human tool-approval checks via POST /api/respond by matching only rpcId, approvalId, and sessionId values broadcast over the ungated stream.
References
- github.com/deepseek-ai/deepseek-harness/releases/tag/dsh-v0.1.2-alpha.2 (opens in a new tab)
- github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27 (opens in a new tab)
- vulncheck.com/advisories/deepseek-harness-unauthenticated-rpc-command-execution (opens in a new tab)