CVE-2026-56402

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-23. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 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(high)
EPSS
11.6%
KEV
Not listed

Published

June 23, 2026

Last Modified

June 23, 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 24× in last 7d / 46× 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. 2026-07-07 02:58 UTCEG score recompute
  2. 2026-07-07 02:58 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-06 02:08 UTCEG score recompute
  8. 2026-07-06 02:08 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-05 01:17 UTCEG score recompute
  12. 2026-07-05 01:17 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-04 00:13 UTCEG score recompute
  16. 2026-07-04 00:13 UTCGHSA enrichment
  17. 2026-07-02 23:23 UTCEG score recompute
  18. 2026-07-02 23:23 UTCGHSA enrichment
  19. 2026-07-01 22:33 UTCEG score recompute
  20. 2026-07-01 22:33 UTCGHSA enrichment
  21. 2026-07-01 15:07 UTCEPSS rescore
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 21:41 UTCEG score recompute
  24. 2026-06-30 21:41 UTCGHSA enrichment
  25. 2026-06-29 20:51 UTCEG score recompute
Show 21 more
  1. 2026-06-29 20:51 UTCGHSA enrichment
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-29 14:06 UTCEPSS rescore
  4. 2026-06-28 20:01 UTCEG score recompute
  5. 2026-06-28 20:01 UTCGHSA enrichment
  6. 2026-06-28 14:07 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-28 04:56 UTCEPSS rescore
  9. 2026-06-27 19:11 UTCEG score recompute
  10. 2026-06-27 19:11 UTCGHSA enrichment
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-26 18:20 UTCEG score recompute
  13. 2026-06-26 18:20 UTCGHSA enrichment
  14. 2026-06-25 17:27 UTCEG score recompute
  15. 2026-06-25 17:27 UTCGHSA enrichment
  16. 2026-06-25 13:49 UTCEPSS rescore
  17. 2026-06-24 16:37 UTCEG score recompute
  18. 2026-06-24 16:37 UTCGHSA enrichment
  19. 2026-06-24 14:05 UTCEPSS rescore
  20. 2026-06-23 15:47 UTCEG score recompute
  21. 2026-06-23 15:45 UTCMITRE cvelistV5first tracked

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. 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 11.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56402?
CVE-2026-56402 has a CVSS v3 base score of 6.5 (NVD).
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.

Dependency Blast Radius

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