Use of Cache Containing Sensitive Information Affecting ghost package, versions >=4.0.0 <6.37.0
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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Test your applications- Snyk IDSNYK-JS-GHOST-17817058
- published4 Jul 2026
- disclosed1 Jul 2026
- creditUnknown
Introduced: 1 Jul 2026
NewCVE-2026-53943 (opens in a new tab)How to fix?
Upgrade ghost to version 6.37.0 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Use of Cache Containing Sensitive Information in the handling of the x-ghost-preview header when the application is deployed behind a shared caching layer. An attacker can inject malicious content into cached responses by sending crafted requests with this header, causing subsequent visitors to receive altered frontend pages. This can lead to account takeover if the frontend and admin panel are hosted on the same domain. This is only exploitable if a shared cache is configured to serve cached content across users and the frontend and admin panel are on the same domain.
Workaround
This vulnerability can be mitigated by configuring the caching layer to bypass the cache for requests containing the x-ghost-preview header.