CVE-2026-17434

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-07-26. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

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

A flaw has been found in nanocoai NanoClaw up to 2.0.64. Affected is the function handleAddMcpServer of the file src/modules/self-mod/request.ts of the component add_mcp_server. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been published and may be used. This patch is called e5b928783d5c485637565eb07d2967922dfbf8d8. A patch should be applied to remediate this issue.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

July 26, 2026

Last Modified

July 27, 2026

Advisory Details (3)

Auto-updated Jul 26, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

GitHub - nanocoai/nanoclaw: A lightweight alternative to OpenClaw that runs in containers for security. Connects to WhatsApp, Telegram, Slack, Discord, Gmail and other messaging apps,, has memory, scheduled jobs, and runs directly on Anthropic's Agents SDK · GitHub

https://github.com/nanocoai/nanoclaw/
github_pr

fix(self-mod): render full MCP server payload on the approval card

Fix merged in nanocoai/nanoclaw PR #2998 on 2026-07-13 — awaiting tagged release

https://github.com/nanocoai/nanoclaw/pull/2998
generic

[Security] NanoClaw `add_mcp_server` approval flow allows hidden `args` and `env` to be approved and persisted without being shown to the approver · Issue #2762 · nanocoai/nanoclaw · GitHub

https://github.com/nanocoai/nanoclaw/issues/2762

Vendor Advisories for CVE-2026-17434(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 18× in last 7d / 70× 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 139 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-17434?
CVE-2026-17434 is a medium vulnerability published on July 26, 2026. A flaw has been found in nanocoai NanoClaw up to 2.0.64. Affected is the function handleAddMcpServer of the file src/modules/self-mod/request.ts of the component addmcpserver. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been…
When was CVE-2026-17434 disclosed?
CVE-2026-17434 was first published in the National Vulnerability Database on July 26, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17434 actively exploited?
CVE-2026-17434 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 86.6% of all scored CVEs.
What is the CVSS score of CVE-2026-17434?
CVE-2026-17434 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-17434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17434, 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.

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