Arbitrary File Upload Affecting ghost package, versions >=5.94.0 <6.64.0
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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Start learning- Snyk IDSNYK-JS-GHOST-21693956
- published24 Oct 2026
- disclosed7 Oct 2026
- creditThai Son Dinh, 5255fgh
Introduced: 7 Oct 2026
NewCVE-2026-104413 (opens in a new tab)How to fix?
Upgrade ghost to version 6.64.0 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Arbitrary File Upload via the bookmark card image handling in oembed-service.js, where the file extension used to name a stored image is derived from the attacker-controlled URL rather than the actual file contents. An authenticated attacker can supply a URL pointing to a file with a misleading extension, causing the stored file to be served with an incorrect Content-Type that bypasses the image upload allowlist, leading to high-impact confidentiality and integrity compromise.