CVE-2026-56063

HIGHPre-NVD 8.38.3—
EchelonGraph scoreHIGH confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. a secondary CVSS source baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.3Exploit: NoneExposed: 0

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

Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.

CVSS v3
8.3
EG Score
8.3(high)
EPSS
7.5%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 26, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
No patch confirmed yet.
generic

Broken Access Control in WordPress MailChimp Block Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/block-for-mailchimp/vulnerability/wordpress-mailchimp-block-plugin-1-1-15-broken-access-control-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-56063(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 36× in last 7d / 57× 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 02:17 UTCEG score recompute
  2. 2026-07-07 02:17 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 13:36 UTCEG score recompute
  6. 2026-07-06 13:36 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 01:06 UTCEG score recompute
  10. 2026-07-06 01:05 UTCGHSA enrichment
  11. 2026-07-05 12:28 UTCEG score recompute
  12. 2026-07-05 12:28 UTCGHSA enrichment
  13. 2026-07-05 02:31 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 23:56 UTCEG score recompute
  16. 2026-07-04 23:56 UTCGHSA enrichment
  17. 2026-07-04 11:25 UTCEG score recompute
  18. 2026-07-04 11:25 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 22:55 UTCEG score recompute
  22. 2026-07-03 22:55 UTCGHSA enrichment
  23. 2026-07-03 10:25 UTCEG score recompute
  24. 2026-07-03 10:25 UTCGHSA enrichment
  25. 2026-07-02 21:52 UTCEG score recompute
Show 32 more
  1. 2026-07-02 21:51 UTCGHSA enrichment
  2. 2026-07-02 09:21 UTCEG score recompute
  3. 2026-07-02 09:21 UTCGHSA enrichment
  4. 2026-07-01 20:51 UTCEG score recompute
  5. 2026-07-01 20:51 UTCGHSA enrichment
  6. 2026-07-01 15:07 UTCEPSS rescore
  7. 2026-07-01 08:21 UTCEG score recompute
  8. 2026-07-01 08:21 UTCGHSA enrichment
  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-30 19:50 UTCEG score recompute
  11. 2026-06-30 19:50 UTCGHSA enrichment
  12. 2026-06-30 07:19 UTCEG score recompute
  13. 2026-06-30 07:19 UTCGHSA enrichment
  14. 2026-06-29 18:48 UTCEG score recompute
  15. 2026-06-29 18:48 UTCGHSA enrichment
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 06:17 UTCEG score recompute
  19. 2026-06-29 06:17 UTCGHSA enrichment
  20. 2026-06-28 17:46 UTCEG score recompute
  21. 2026-06-28 17:45 UTCGHSA enrichment
  22. 2026-06-28 14:07 UTCEPSS rescore
  23. 2026-06-28 05:13 UTCEG score recompute
  24. 2026-06-28 05:13 UTCGHSA enrichment
  25. 2026-06-28 04:56 UTCEPSS rescore
  26. 2026-06-28 04:56 UTCEPSS rescore
  27. 2026-06-27 16:43 UTCEG score recompute
  28. 2026-06-27 16:43 UTCGHSA enrichment
  29. 2026-06-27 04:12 UTCEG score recompute
  30. 2026-06-27 04:12 UTCGHSA enrichment
  31. 2026-06-26 15:42 UTCEG score recompute
  32. 2026-06-26 15:41 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-56063?
CVE-2026-56063 is a high vulnerability published on June 26, 2026. Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.
When was CVE-2026-56063 disclosed?
CVE-2026-56063 was first published in the National Vulnerability Database on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56063 actively exploited?
CVE-2026-56063 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56063?
CVE-2026-56063 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-56063?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56063, 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

Explore the affected products and dependency analysis for CVE-2026-56063

Explore →

Is Your Infrastructure Affected by CVE-2026-56063?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs