What is CVE-2026-103278?

CVE-2026-103278 is a high-severity vulnerability in Tryghost Ghost, classified under Relative Path Traversal. CVSS score: 7.3/10. Published 2026-10-01.

How severe is CVE-2026-103278?

High severity. CVSS v3 base score is 7.3 out of 10.

Path Traversal in Tryghost Ghost

CVE-2026-103278

Ghost versions 5.8.0 before 6.34.0 contain an input validation vulnerability in the admin iframe that allows attackers to take over staff user accounts. Attackers with content publishing privileges can craft malicious pages that, when visited by active staff users, enable account takeover through improper input validation.

Published 2026-10-01.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Tryghost Ghost

Weakness classification (CWE)

CWE-23 — Relative Path Traversal

References

github.com/TryGhost/Ghost/security/advisories/GHSA-5pxf-whwv-g54g (vendor-advisory)
www.vulncheck.com/advisories/ghost-5.8.0-before-6.34.0-staff-account-takeover-v… (third-party-advisory)

Frequently asked questions

What is CVE-2026-103278?: CVE-2026-103278 is a high-severity vulnerability in Tryghost Ghost, classified under Relative Path Traversal. CVSS score: 7.3/10. Published 2026-10-01.
How severe is CVE-2026-103278?: High severity. CVSS v3 base score is 7.3 out of 10.