CVE-2026-103278

High

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.

SeverityHigh

CVSS7.3

Exploit probability—

Product

Ghost

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-23CWE-23

How to fix

Update

TryGhost Ghost6.34.0 or later

Vendor advisories

github.com/TryGhost/Ghost/security/advisories/GHSA-5pxf-whwv-g54g

Affected products

Product	Affected versions	Fixed in
TryGhost Ghost	5.8.0 ≤ v < 6.34.0	6.34.0

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