TryGhost up to 6.33.x Admin Iframe input validation

Summaryinfo

A vulnerability was found in TryGhost Ghost up to 6.33.x. It has been declared as critical. This issue affects some unknown processing of the component Admin Iframe. The manipulation results in input validation. This vulnerability is cataloged as CVE-2026-103278. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in TryGhost Ghost up to 6.33.x. Affected is some unknown processing of the component Admin Iframe. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-103278 since 09/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 6.34.0 eliminates this vulnerability.

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Productinfo

Vendor

• TryGhost

Name

• Ghost

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8
• 6.9
• 6.10
• 6.11
• 6.12
• 6.13
• 6.14
• 6.15
• 6.16
• 6.17
• 6.18
• 6.19
• 6.20
• 6.21
• 6.22
• 6.23
• 6.24
• 6.25
• 6.26
• 6.27
• 6.28
• 6.29
• 6.30
• 6.31
• 6.32
• 6.33

Website

• Product: https://github.com/TryGhost/Ghost/

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