CVE-2026-103274: Ghost access control bypass on private comments

CVE-2026-103274 · Severity: medium · CVSS 5.3 · Published 2026-10-01

Ghost is a blogging and content management platform. Versions 5.3.0 through 6.57.x fail to properly restrict access to comments when private mode is enabled, allowing unauthenticated visitors to read comments that should remain private. This bypasses the platform's privacy settings and exposes restricted content.

Technologies: Ghost. Vendors: Ghost.

Quick answers

Is CVE-2026-103274 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-103274 being exploited in the wild.
How severe is CVE-2026-103274?
Medium severity, with a CVSS score of 5.3, published 1 October 2026.
Which products and versions are affected?
Ghost 5.3.0 to 6.57.x.
Is there a fix for CVE-2026-103274?
Yes: fixed in 6.58.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-103274 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-103274?
Check whether you run 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: 6.58.0

Technical details

Ghost's comment access control mechanism fails to enforce authorization checks when private mode is enabled, allowing unauthenticated network requests to retrieve comment data that should be restricted. This is a missing authorization vulnerability (CWE-862) in the comments API endpoint. An attacker requires no authentication, user interaction, or privileges and can directly access the vulnerability over the network.

Affected products

  • Ghost Ghost 5.3.0 to 6.57.x

Timeline

  • 2026-08-20: disclosed
  • 2026-10-01: advisory

References

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