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PatchSiren cyber security CVE debrief

CVE-2026-42853 apostrophecms CVE debrief

ApostropheCMS's @apostrophecms/cli package, up to and including version 3.6.0, contains a command injection vulnerability in the apos create command. User-supplied input from the password prompt is embedded directly into a shell command without proper sanitization or escaping, allowing execution of arbitrary commands on the host system. As of publication, no patched versions are available.

Vendor
apostrophecms
Product
@apostrophecms/cli
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Users of ApostropheCMS's @apostrophecms/cli package, particularly those using versions up to and including 3.6.0, should be aware of this vulnerability and take necessary precautions.

Technical summary

The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. It requires local access, low attack complexity, high privileges, and user interaction. Successful exploitation can lead to high impact on confidentiality, integrity, and availability.

Defensive priority

MEDIUM

Recommended defensive actions

  • Users should exercise caution when using the apos create command and avoid providing unsanitized input.
  • Administrators should monitor their systems for suspicious activity and consider implementing additional security measures.
  • Users should check for updates to the @apostrophecms/cli package and upgrade to a patched version as soon as it becomes available.

Evidence notes

This vulnerability was reported via the National Vulnerability Database (NVD) and is tracked under CVE-2026-42853. More information can be found at [cve-org].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42853 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42853

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-42853 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42853

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.