CVE-2026-19244

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreHIGH 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%CVSS: 4.7Exploit: Elevated riskExposed: 0

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

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
4.7(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity47% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

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 20× in last 7d / 43× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 18:15 UTCGHSA enrichment
  3. 2026-08-19 18:46 UTCEG score recompute
  4. 2026-08-19 18:46 UTCGHSA enrichment
  5. 2026-08-19 17:03 UTCEPSS rescore
  6. 2026-08-18 18:53 UTCEG score recompute
  7. 2026-08-18 18:53 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 19:24 UTCEG score recompute
  10. 2026-08-17 19:24 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 19:01 UTCEG score recompute
  13. 2026-08-16 19:01 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 19:32 UTCEG score recompute
  17. 2026-08-15 19:32 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 20:02 UTCEG score recompute
  20. 2026-08-14 20:02 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 20:33 UTCGHSA enrichment
  23. 2026-08-12 21:04 UTCGHSA enrichment
  24. 2026-08-12 18:57 UTCEG score recompute
  25. 2026-08-12 18:57 UTCGHSA enrichment
Show 18 more
  1. 2026-08-12 13:50 UTCEPSS rescore
  2. 2026-08-11 19:28 UTCEG score recompute
  3. 2026-08-11 19:28 UTCGHSA enrichment
  4. 2026-08-11 13:42 UTCEPSS rescore
  5. 2026-08-11 00:00 UTCEPSS rescore
  6. 2026-08-10 19:59 UTCGHSA enrichment
  7. 2026-08-09 20:30 UTCEG score recompute
  8. 2026-08-09 20:30 UTCGHSA enrichment
  9. 2026-08-09 13:46 UTCEPSS rescore
  10. 2026-08-08 21:01 UTCEG score recompute
  11. 2026-08-08 21:01 UTCGHSA enrichment
  12. 2026-08-08 16:37 UTCEPSS rescore
  13. 2026-08-07 21:32 UTCEG score recompute
  14. 2026-08-07 21:32 UTCGHSA enrichment
  15. 2026-08-07 21:31 UTCNVD updateCVSS v4 → 2
  16. 2026-08-07 21:02 UTCEG score recompute
  17. 2026-08-07 20:47 UTCEG score recompute
  18. 2026-08-07 20:47 UTCMITRE cvelistV5first tracked

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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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 80.3% of all scored CVEs.
What is the CVSS score of CVE-2026-19244?
CVE-2026-19244 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-19244?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19244, 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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