CVE-2026-19244

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory (severity: LOW) published 2026-08-07. A secondary CVSS source baseline 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 4.7Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

A vulnerability was detected in HKUDS nanobot up to 0.2.1. The affected element is the function connect_mcp_servers of the file nanobot/agent/tools/mcp.py of the component MCP enabledTools Scope Handler. Performing a manipulation results in improper access controls. The attack is possible to be carried out remotely. The exploit is now public and may be used. Upgrading to version 0.3.0 is sufficient to fix this issue. The patch is named 4436. You should upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: "Both reports describe the same root cause: MCP resource and prompt wrappers could be registered outside the intended enabledTools scope. The registration boundary was corrected".

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

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
Severity47% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 7, 2026

Last Modified

August 12, 2026

Advisory Details (5)

Auto-updated Aug 7, 2026
Patch available. Sources: github_pr, github_release.
generic

GitHub - HKUDS/nanobot: Ultra-lightweight, open-source, self-hosted personal AI agent framework in Python with WebUI, tools, memory, MCP, multi-agent workflows, automation, and chat apps · GitHub

https://github.com/HKUDS/nanobot/
github_release Patch Available

v0.3.0

Patch available: HKUDS/nanobot v0.3.0

https://github.com/HKUDS/nanobot/releases/tag/v0.3.0
github_pr

fix(tools): gate MCP resource and prompt registration behind enabledTools

Fix merged in HKUDS/nanobot PR #4436 on 2026-06-25 — awaiting tagged release

https://github.com/HKUDS/nanobot/pull/4436
generic

nanobot: MCP `enabled_tools` Allowlist Bypass Registers Resource and Prompt Capabilities Despite Deny-All Policy · GitHub

https://gist.github.com/YLChen-007/3de5f50d167a878f7530f57ed018d508
generic

[Security] nanobot MCP `enabledTools` allowlist bypass exposes resource and prompt capabilities · Issue #4435 · HKUDS/nanobot · GitHub

https://github.com/HKUDS/nanobot/issues/4435

Vendor Advisories for CVE-2026-19244(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 66× 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.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-10-05 08:11 UTCEG score recompute
  2. 2026-10-05 08:11 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 05:42 UTCEG score recompute
  5. 2026-10-04 05:42 UTCGHSA enrichment
  6. 2026-10-02 09:29 UTCEG score recompute
  7. 2026-10-02 09:29 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 22:54 UTCEG score recompute
  10. 2026-09-30 22:54 UTCGHSA enrichment
  11. 2026-09-30 15:02 UTCEPSS rescore
  12. 2026-09-29 15:20 UTCEPSS rescore
  13. 2026-09-29 05:42 UTCEG score recompute
  14. 2026-09-29 05:42 UTCGHSA enrichment
  15. 2026-09-28 13:51 UTCEPSS rescore
  16. 2026-09-27 17:07 UTCEG score recompute
  17. 2026-09-27 17:07 UTCGHSA enrichment
  18. 2026-09-27 13:47 UTCEPSS rescore
  19. 2026-09-26 15:58 UTCEPSS rescore
  20. 2026-09-25 10:13 UTCEG score recompute
  21. 2026-09-25 10:13 UTCGHSA enrichment
  22. 2026-09-24 10:44 UTCEG score recompute
  23. 2026-09-24 10:44 UTCGHSA enrichment
  24. 2026-09-23 11:02 UTCEG score recompute
  25. 2026-09-23 11:02 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 11:32 UTCEG score recompute
  2. 2026-09-22 11:31 UTCGHSA enrichment
  3. 2026-09-21 12:01 UTCEG score recompute
  4. 2026-09-21 12:01 UTCGHSA enrichment
  5. 2026-09-20 00:52 UTCEG score recompute
  6. 2026-09-20 00:52 UTCGHSA enrichment
  7. 2026-09-19 01:18 UTCEG score recompute
  8. 2026-09-19 01:18 UTCGHSA enrichment
  9. 2026-09-18 19:27 UTCEPSS rescore
  10. 2026-09-18 01:49 UTCEG score recompute
  11. 2026-09-18 01:49 UTCGHSA enrichment
  12. 2026-09-17 02:20 UTCEG score recompute
  13. 2026-09-17 02:20 UTCGHSA enrichment
  14. 2026-09-16 14:07 UTCEPSS rescore
  15. 2026-09-16 05:14 UTCEPSS rescore
  16. 2026-09-16 02:49 UTCEG score recompute
  17. 2026-09-16 02:49 UTCGHSA enrichment
  18. 2026-09-15 02:59 UTCGHSA enrichment
  19. 2026-09-14 03:30 UTCEG score recompute
  20. 2026-09-14 03:30 UTCGHSA enrichment
  21. 2026-09-13 16:46 UTCEPSS rescore
  22. 2026-09-13 04:01 UTCEG score recompute
  23. 2026-09-13 04:01 UTCGHSA enrichment
  24. 2026-09-12 15:00 UTCEPSS rescore
  25. 2026-09-12 04:31 UTCEG score recompute
  26. 2026-09-12 04:31 UTCGHSA enrichment
  27. 2026-09-11 14:52 UTCEPSS rescore
  28. 2026-09-11 09:36 UTCEPSS rescore
  29. 2026-09-11 05:01 UTCEG score recompute
  30. 2026-09-11 05:01 UTCGHSA enrichment
  31. 2026-09-10 09:34 UTCEPSS rescore
  32. 2026-09-10 05:31 UTCGHSA enrichment
  33. 2026-09-09 05:59 UTCEG score recompute
  34. 2026-09-09 05:59 UTCGHSA enrichment
  35. 2026-09-08 22:00 UTCEPSS rescore
  36. 2026-09-07 17:42 UTCEG score recompute
  37. 2026-09-07 17:42 UTCGHSA enrichment
  38. 2026-09-07 16:01 UTCEPSS rescore
  39. 2026-09-06 13:47 UTCEPSS rescore
  40. 2026-09-06 02:50 UTCEG score recompute
  41. 2026-09-06 02:50 UTCGHSA enrichment
  42. 2026-09-05 03:21 UTCEG score recompute
  43. 2026-09-05 03:21 UTCGHSA enrichment
  44. 2026-09-04 05:06 UTCEPSS rescore
  45. 2026-09-04 03:38 UTCGHSA enrichment
  46. 2026-09-03 04:03 UTCEG score recompute
  47. 2026-09-03 04:02 UTCGHSA enrichment
  48. 2026-09-02 14:11 UTCEPSS rescore
  49. 2026-09-01 17:37 UTCEG score recompute
  50. 2026-09-01 17:37 UTCGHSA enrichment
  51. 2026-09-01 13:53 UTCEPSS rescore
  52. 2026-09-01 04:39 UTCEPSS rescore
  53. 2026-08-31 09:59 UTCEG score recompute
  54. 2026-08-31 09:59 UTCGHSA enrichment
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 09:55 UTCEG score recompute
  57. 2026-08-30 09:55 UTCGHSA enrichment
  58. 2026-08-30 01:22 UTCEPSS rescore
  59. 2026-08-29 10:21 UTCEG score recompute
  60. 2026-08-29 10:21 UTCGHSA enrichment
  61. 2026-08-28 21:41 UTCEPSS rescore
  62. 2026-08-27 19:48 UTCEG score recompute
  63. 2026-08-27 19:48 UTCGHSA enrichment
  64. 2026-08-27 14:25 UTCEPSS rescore
  65. 2026-08-26 18:58 UTCEG score recompute
  66. 2026-08-26 18:58 UTCGHSA enrichment
  67. 2026-08-26 14:46 UTCEPSS rescore
  68. 2026-08-25 17:18 UTCEG score recompute
  69. 2026-08-25 17:18 UTCGHSA enrichment
  70. 2026-08-25 13:48 UTCEPSS rescore
  71. 2026-08-24 17:32 UTCEG score recompute
  72. 2026-08-24 17:32 UTCGHSA enrichment
  73. 2026-08-23 16:42 UTCEG score recompute
  74. 2026-08-23 16:42 UTCGHSA enrichment
  75. 2026-08-23 00:19 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-19244?
CVE-2026-19244 is a medium vulnerability published on August 7, 2026. A vulnerability was detected in HKUDS nanobot up to 0.2.1. The affected element is the function connectmcpservers of the file nanobot/agent/tools/mcp.py of the component MCP enabledTools Scope Handler. Performing a manipulation results in improper access controls. The attack is possible to be…
When was CVE-2026-19244 disclosed?
CVE-2026-19244 was first published on August 7, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19244 actively exploited?
CVE-2026-19244 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19244?
CVE-2026-19244 has a CVSS base score of 4.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-19244?
A fix for CVE-2026-19244 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-19244 are linked in the Vendor Advisories panel on this page.

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