CVE-2026-82533

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-08. a secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
9.6
EG Score
9.6(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Sep 14, 2026
🔬 Proof of concept available. Patch available. Sources: github_release.
generic

DeepSeek Harness < 0.1.2-alpha.1 Authentication Bypass via Host Header Spoofing | Advisories | VulnCheck

https://www.vulncheck.com/advisories/deepseek-harness-alpha-1-authentication-bypass-via-host-header-spoofing
generic🟡 PoC Available

CVE-2026-82533: DeepSeek Harness AI Agent Sandbox Escape

https://www.ox.security/blog/cve-2026-82533-deepseek-harness-ai-agent-sandbox-escape/
github_release Patch Available

v0.1.2-alpha.1

Patch available: deepseek-ai/deepseek-harness dsh-v0.1.2-alpha.1 (pre-release)

https://github.com/deepseek-ai/deepseek-harness/releases/tag/dsh-v0.1.2-alpha.1

Vendor Advisories for CVE-2026-82533(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 53× in last 7d / 88× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 04:13 UTCGHSA enrichment
  2. 2026-09-19 00:13 UTCGHSA enrichment
  3. 2026-09-18 20:15 UTCEG score recompute
  4. 2026-09-18 20:15 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 16:14 UTCGHSA enrichment
  7. 2026-09-18 12:14 UTCGHSA enrichment
  8. 2026-09-18 08:14 UTCGHSA enrichment
  9. 2026-09-18 04:16 UTCGHSA enrichment
  10. 2026-09-18 00:18 UTCGHSA enrichment
  11. 2026-09-17 20:19 UTCEG score recompute
  12. 2026-09-17 20:19 UTCGHSA enrichment
  13. 2026-09-17 15:31 UTCGHSA enrichment
  14. 2026-09-17 11:32 UTCGHSA enrichment
  15. 2026-09-17 07:33 UTCGHSA enrichment
  16. 2026-09-17 03:34 UTCGHSA enrichment
  17. 2026-09-16 23:36 UTCGHSA enrichment
  18. 2026-09-16 19:37 UTCGHSA enrichment
  19. 2026-09-16 15:35 UTCEG score recompute
  20. 2026-09-16 15:35 UTCGHSA enrichment
  21. 2026-09-16 14:08 UTCEPSS rescore
  22. 2026-09-16 11:20 UTCGHSA enrichment
  23. 2026-09-16 07:22 UTCEG score recompute
  24. 2026-09-16 07:22 UTCGHSA enrichment
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 63 more
  1. 2026-09-16 03:23 UTCGHSA enrichment
  2. 2026-09-15 23:23 UTCGHSA enrichment
  3. 2026-09-15 19:25 UTCGHSA enrichment
  4. 2026-09-15 15:26 UTCGHSA enrichment
  5. 2026-09-15 11:27 UTCGHSA enrichment
  6. 2026-09-15 07:28 UTCGHSA enrichment
  7. 2026-09-15 03:29 UTCEG score recompute
  8. 2026-09-15 03:29 UTCGHSA enrichment
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-14 23:30 UTCGHSA enrichment
  12. 2026-09-14 19:13 UTCGHSA enrichment
  13. 2026-09-14 15:15 UTCGHSA enrichment
  14. 2026-09-14 11:17 UTCGHSA enrichment
  15. 2026-09-14 07:18 UTCGHSA enrichment
  16. 2026-09-14 03:20 UTCGHSA enrichment
  17. 2026-09-13 23:22 UTCGHSA enrichment
  18. 2026-09-13 19:24 UTCEG score recompute
  19. 2026-09-13 19:24 UTCGHSA enrichment
  20. 2026-09-13 15:26 UTCGHSA enrichment
  21. 2026-09-13 11:27 UTCGHSA enrichment
  22. 2026-09-13 07:28 UTCGHSA enrichment
  23. 2026-09-13 03:30 UTCGHSA enrichment
  24. 2026-09-12 23:31 UTCGHSA enrichment
  25. 2026-09-12 19:33 UTCGHSA enrichment
  26. 2026-09-12 15:35 UTCEG score recompute
  27. 2026-09-12 15:35 UTCGHSA enrichment
  28. 2026-09-12 11:37 UTCGHSA enrichment
  29. 2026-09-12 07:38 UTCGHSA enrichment
  30. 2026-09-12 03:38 UTCGHSA enrichment
  31. 2026-09-11 23:39 UTCGHSA enrichment
  32. 2026-09-11 19:41 UTCGHSA enrichment
  33. 2026-09-11 15:43 UTCEG score recompute
  34. 2026-09-11 15:43 UTCGHSA enrichment
  35. 2026-09-11 14:53 UTCEPSS rescore
  36. 2026-09-11 14:53 UTCEPSS rescore
  37. 2026-09-11 11:44 UTCEG score recompute
  38. 2026-09-11 11:44 UTCGHSA enrichment
  39. 2026-09-11 07:46 UTCGHSA enrichment
  40. 2026-09-11 03:48 UTCGHSA enrichment
  41. 2026-09-10 23:49 UTCGHSA enrichment
  42. 2026-09-10 19:24 UTCGHSA enrichment
  43. 2026-09-10 15:26 UTCEG score recompute
  44. 2026-09-10 15:26 UTCGHSA enrichment
  45. 2026-09-10 15:01 UTCGHSA enrichment
  46. 2026-09-10 14:45 UTCEG score recompute
  47. 2026-09-10 14:45 UTCGHSA enrichment
  48. 2026-09-10 11:04 UTCEG score recompute
  49. 2026-09-10 11:03 UTCGHSA enrichment
  50. 2026-09-10 07:03 UTCGHSA enrichment
  51. 2026-09-10 03:04 UTCGHSA enrichment
  52. 2026-09-09 23:05 UTCGHSA enrichment
  53. 2026-09-09 16:19 UTCGHSA enrichment
  54. 2026-09-09 12:17 UTCGHSA enrichment
  55. 2026-09-09 08:18 UTCGHSA enrichment
  56. 2026-09-09 04:20 UTCGHSA enrichment
  57. 2026-09-09 00:21 UTCGHSA enrichment
  58. 2026-09-08 20:11 UTCGHSA enrichment
  59. 2026-09-08 19:48 UTCEG score recompute
  60. 2026-09-08 19:48 UTCGHSA enrichment
  61. 2026-09-08 18:13 UTCEG score recompute
  62. 2026-09-08 17:06 UTCEG score recompute
  63. 2026-09-08 17:04 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82533?
CVE-2026-82533 is a critical vulnerability published on September 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…
When was CVE-2026-82533 disclosed?
CVE-2026-82533 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82533 actively exploited?
CVE-2026-82533 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.6% of all scored CVEs.
What is the CVSS score of CVE-2026-82533?
CVE-2026-82533 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-82533?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82533, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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