Arbitrary File Upload Affecting ghost package, versions >=4.0.0 <6.67.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Oct 2026
- disclosed7 Oct 2026
- creditZhixi "Jace" Sun
Introduced: 7 Oct 2026
NewCVE-2026-105644 (opens in a new tab)How to fix?
Upgrade ghost to version 6.67.0 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Arbitrary File Upload via insufficient image content type validation in the image upload, import, and remote image inlining pipelines. Prior to the fix, image files were accepted based on extension or declared content type alone, without verifying that the file's actual contents matched an allowed image format. An attacker who can induce a user to trigger an image upload or import can supply a file whose extension or MIME type claims it is an image while its contents are of a different, potentially dangerous type, leading to confidentiality and integrity compromise.