CVE-2026-56402

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-23. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

NanoClaw before 2.1.17 contains a privilege escalation vulnerability in the handleApprovalsResponse function that fails to verify responder role authorization. Attackers with a valid questionId can approve or reject privileged actions like package installation by submitting approval response payloads without proper role validation.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

June 23, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jun 23, 2026
Patch available. Sources: github_pr, github_commit.
generic

NanoClaw < 2.1.17 - Privilege Escalation via Unverified Approval Response Handler | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nanoclaw-privilege-escalation-via-unverified-approval-response-handler
github_commit Patch Available

commit 6227bd1a5b01 (nanocoai/nanoclaw)

Patch available: nanocoai/nanoclaw v2.1.17 (contains commit 6227bd1a5b01)

https://github.com/nanocoai/nanoclaw/commit/6227bd1a5b016fb1eb76411bb6681b4c924a51a0
github_pr Patch Available

[security] fix(approvals): require admin for approval responses

Patch available: nanocoai/nanoclaw v2.1.17 (PR #2478 merged 2026-06-09)

https://github.com/nanocoai/nanoclaw/pull/2478

Vendor Advisories for CVE-2026-56402(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 20× in last 7d / 69× 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. 2026-08-03 10:36 UTCEPSS rescore
  2. 2026-08-03 07:58 UTCGHSA enrichment
  3. 2026-08-02 05:32 UTCEG score recompute
  4. 2026-08-02 05:32 UTCGHSA enrichment
  5. 2026-08-02 02:27 UTCEPSS rescore
  6. 2026-08-01 04:42 UTCEG score recompute
  7. 2026-08-01 04:42 UTCGHSA enrichment
  8. 2026-08-01 04:16 UTCEPSS rescore
  9. 2026-07-31 03:41 UTCEG score recompute
  10. 2026-07-31 03:40 UTCGHSA enrichment
  11. 2026-07-30 16:28 UTCEPSS rescore
  12. 2026-07-30 02:37 UTCEG score recompute
  13. 2026-07-30 02:37 UTCGHSA enrichment
  14. 2026-07-30 01:30 UTCEPSS rescore
  15. 2026-07-30 01:30 UTCEPSS rescore
  16. 2026-07-29 01:17 UTCEG score recompute
  17. 2026-07-29 01:17 UTCGHSA enrichment
  18. 2026-07-28 15:37 UTCEPSS rescore
  19. 2026-07-27 17:48 UTCEG score recompute
  20. 2026-07-27 17:48 UTCGHSA enrichment
  21. 2026-07-26 15:54 UTCEG score recompute
  22. 2026-07-26 15:54 UTCGHSA enrichment
  23. 2026-07-26 14:54 UTCEPSS rescore
  24. 2026-07-25 14:18 UTCEPSS rescore
  25. 2026-07-24 14:18 UTCEPSS rescore
Show 68 more
  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:20 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:25 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 02:29 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:03 UTCEPSS rescore
  11. 2026-07-16 11:17 UTCGHSA enrichment
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 09:51 UTCGHSA enrichment
  15. 2026-07-15 02:00 UTCEPSS rescore
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-14 08:59 UTCGHSA enrichment
  18. 2026-07-13 22:31 UTCEPSS rescore
  19. 2026-07-13 08:09 UTCGHSA enrichment
  20. 2026-07-13 06:13 UTCEPSS rescore
  21. 2026-07-13 06:13 UTCEPSS rescore
  22. 2026-07-12 07:18 UTCGHSA enrichment
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-11 08:27 UTCEPSS rescore
  25. 2026-07-11 08:27 UTCEPSS rescore
  26. 2026-07-11 06:27 UTCGHSA enrichment
  27. 2026-07-10 05:31 UTCGHSA enrichment
  28. 2026-07-09 19:10 UTCEPSS rescore
  29. 2026-07-09 19:10 UTCEPSS rescore
  30. 2026-07-09 04:38 UTCGHSA enrichment
  31. 2026-07-08 15:16 UTCEPSS rescore
  32. 2026-07-08 15:16 UTCEPSS rescore
  33. 2026-07-08 03:48 UTCGHSA enrichment
  34. 2026-07-07 13:46 UTCEPSS rescore
  35. 2026-07-07 13:46 UTCEPSS rescore
  36. 2026-07-07 02:58 UTCGHSA enrichment
  37. 2026-07-06 16:27 UTCEPSS rescore
  38. 2026-07-06 16:27 UTCEPSS rescore
  39. 2026-07-06 02:23 UTCEPSS rescore
  40. 2026-07-06 02:23 UTCEPSS rescore
  41. 2026-07-06 02:08 UTCGHSA enrichment
  42. 2026-07-05 02:31 UTCEPSS rescore
  43. 2026-07-05 02:30 UTCEPSS rescore
  44. 2026-07-05 01:17 UTCGHSA enrichment
  45. 2026-07-04 06:31 UTCEPSS rescore
  46. 2026-07-04 06:31 UTCEPSS rescore
  47. 2026-07-04 00:13 UTCGHSA enrichment
  48. 2026-07-02 23:23 UTCGHSA enrichment
  49. 2026-07-01 22:33 UTCGHSA enrichment
  50. 2026-07-01 15:07 UTCEPSS rescore
  51. 2026-06-30 23:22 UTCEPSS rescore
  52. 2026-06-30 21:41 UTCGHSA enrichment
  53. 2026-06-29 20:51 UTCGHSA enrichment
  54. 2026-06-29 14:06 UTCEPSS rescore
  55. 2026-06-29 14:06 UTCEPSS rescore
  56. 2026-06-28 20:01 UTCGHSA enrichment
  57. 2026-06-28 14:07 UTCEPSS rescore
  58. 2026-06-28 04:56 UTCEPSS rescore
  59. 2026-06-28 04:56 UTCEPSS rescore
  60. 2026-06-27 19:11 UTCGHSA enrichment
  61. 2026-06-27 03:08 UTCEPSS rescore
  62. 2026-06-26 18:20 UTCGHSA enrichment
  63. 2026-06-25 17:27 UTCGHSA enrichment
  64. 2026-06-25 13:49 UTCEPSS rescore
  65. 2026-06-24 16:37 UTCGHSA enrichment
  66. 2026-06-24 14:05 UTCEPSS rescore
  67. 2026-06-23 15:47 UTCEG score recompute
  68. 2026-06-23 15:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56402?
CVE-2026-56402 is a medium vulnerability published on June 23, 2026. NanoClaw before 2.1.17 contains a privilege escalation vulnerability in the handleApprovalsResponse function that fails to verify responder role authorization. Attackers with a valid questionId can approve or reject privileged actions like package installation by submitting approval response…
When was CVE-2026-56402 disclosed?
CVE-2026-56402 was first published in the National Vulnerability Database on June 23, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56402 actively exploited?
CVE-2026-56402 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 88.2% of all scored CVEs.
What is the CVSS score of CVE-2026-56402?
CVE-2026-56402 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-56402?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56402, 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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