{"cve":"CVE-2026-82533","nvd":{"published":"2026-09-08T17:18:36.887","modified":"2026-09-10T15:17:47.593","status":"Deferred","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.","cvss_v4":{"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","score":9.4},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","score":9.6},"cwes":["CWE-807"],"references":["https://github.com/deepseek-ai/deepseek-harness/commit/3e24087bfaeabe40b58ba2f7b936895b8f93fe27","https://github.com/deepseek-ai/deepseek-harness/releases/tag/dsh-v0.1.2-alpha.1","https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/","https://www.vulncheck.com/advisories/deepseek-harness-alpha-1-authentication-bypass-via-host-header-spoofing"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-82533","score":0.01238,"percentile":0.69107,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-8m2g-8cgm-3vcp","url":"https://osv.dev/vulnerability/GHSA-8m2g-8cgm-3vcp","summary":"DeepSeek Harness contains an authentication bypass vulnerability in local HTTP control-plane API","modified":"2026-10-07T21:00:04.349245572Z","packages":[{"ecosystem":"npm","name":"@deepseek-ai/dsh-client-connection","purl":"pkg:npm/%40deepseek-ai/dsh-client-connection","ranges":["<0.1.2-alpha.1"],"fixed":["0.1.2-alpha.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}