What is CVE-2026-42853?

CVE-2026-42853 is a medium-severity vulnerability in Apostrophecms @Apostrophecms/cli, classified under OS Command Injection. CVSS score: 6.5/10. Published 2026-06-12.

How severe is CVE-2026-42853?

Medium severity. CVSS v3 base score is 6.5 out of 10.

RCE in Apostrophecms @Apostrophecms/cli

CVE-2026-42853

ApostropheCMS is an open-source Node.js content management system. Versions of the @apostrophecms/cli package up to and including 3.6.0 contain a command injection vulnerability in the apos create command. User-supplied input from the pass…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.004 (35.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

Affected products

Apostrophecms @Apostrophecms/cli — versions <= 3.6.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42853?: CVE-2026-42853 is a medium-severity vulnerability in Apostrophecms @Apostrophecms/cli, classified under OS Command Injection. CVSS score: 6.5/10. Published 2026-06-12.
How severe is CVE-2026-42853?: Medium severity. CVSS v3 base score is 6.5 out of 10.