All vulnerabilities
CVE-2026-103278GHSA-5pxf-whwv-g54g

Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe

TryGhost GhostApplications & CMS
Open in ThreatlineRecord JSON
CVSS
8.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.27%Chance of exploitation activity in the next 30 days, higher than 18% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in6.34.0Fixed versionCVE List
Published1 Oct 2026Updated 1 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 2

  • Ghostaffected: 5.8.0 before 6.34.0CVE List
  • Ghostunaffected: 6.34.0CVE List

References 2