Is CVE-2026-103278 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-103278 being exploited in the wild.

How severe is CVE-2026-103278?

High severity, with a CVSS score of 7.3, published 1 October 2026.

Which products and versions are affected?

TryGhost Ghost 5.8.0 to before 6.34.0.

Is there a fix for CVE-2026-103278?

Yes: fixed in 6.34.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-103278 attacked?

It is attacked over the network.

Am I affected by CVE-2026-103278?

Check whether you run TryGhost Ghost at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-103278: Ghost input validation in admin iframe allows staff account takeover

CVE-2026-103278 · Severity: high · CVSS 7.3 · Published 2026-10-01

Ghost is a popular blogging and content management platform used by publishers worldwide. Versions 5.8.0 through 6.33.x contain a flaw that allows attackers with content publishing privileges to steal staff accounts by tricking users into visiting malicious pages. An attacker gaining staff access can modify published content, access sensitive data, or further compromise the platform.

Technologies: TryGhost Ghost. Vendors: TryGhost.

Quick answers

Is CVE-2026-103278 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-103278 being exploited in the wild.
How severe is CVE-2026-103278?: High severity, with a CVSS score of 7.3, published 1 October 2026.
Which products and versions are affected?: TryGhost Ghost 5.8.0 to before 6.34.0.
Is there a fix for CVE-2026-103278?: Yes: fixed in 6.34.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-103278 attacked?: It is attacked over the network.
Am I affected by CVE-2026-103278?: Check whether you run TryGhost Ghost at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 6.34.0

Technical details

An input validation vulnerability in the admin iframe (CWE-23) allows privilege escalation from content publisher to staff user. The attack requires a staff member to actively visit a malicious page crafted by a publisher; the insufficient input sanitization then enables account takeover. The vulnerability is fixed in Ghost 6.34.0.

Affected products

TryGhost Ghost 5.8.0 to before 6.34.0

Timeline

2026-08-13: disclosed: GitHub security advisory GHSA-5pxf-whwv-g54g published
2026-10-01: advisory

References

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