Vulnerability in MailChimp Block (CVE-2026-56063)
Summary
Vulnerability in MailChimp Block (CVE-2026-56063). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2026-56063 was discovered in MailChimp Block.
In plain terms, it is a missing authorization check.
Severity is High (CVSS 8.3/10). If exploited, attackers can leak data or disrupt key functionality.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "MailChimp Block CVE-2026-56063".
CVE-2026-56063 (MailChimp Block). Severity: High / CVSSv3 8.3. Category: CWE-862.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2026-56063) in MailChimp Block. In plain words, it is a missing authorization check.
Target versions of MailChimp Block (see vendor advisory). If running in production, identify exposure immediately.
Severity: High (CVSS 8.3/10). If exploited, attackers can leak data or disrupt key functionality.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-862)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
References
- web nvd.nist.gov
- web audit@patchstack.com
- web github.com