What is CVE-2026-70589?

CVE-2026-70589 is a medium-severity vulnerability in Tryghost Ghost, classified under Improper Input Validation. CVSS score: 4.8/10. Published 2026-08-04.

How severe is CVE-2026-70589?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Improper input validation in Tryghost Ghost

CVE-2026-70589

Ghost is a Node.js content management system. From 4.22.0 until 6.54.1, a missing validation check allowed users to redeem subscription offers that were no longer active. This issue is fixed in version 6.54.1.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Tryghost Ghost — versions >= 4.22.0, < 6.54.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-70589?: CVE-2026-70589 is a medium-severity vulnerability in Tryghost Ghost, classified under Improper Input Validation. CVSS score: 4.8/10. Published 2026-08-04.
How severe is CVE-2026-70589?: Medium severity. CVSS v3 base score is 4.8 out of 10.