Time-of-check Time-of-use (TOCTOU) Race Condition Affecting ghost package, versions >=6.0.9 <6.21.2
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-GHOST-17823151
- published6 Jul 2026
- disclosed24 Jun 2026
- creditUnknown
Introduced: 24 Jun 2026
NewCVE-2026-53945 (opens in a new tab)How to fix?
Upgrade ghost to version 6.21.2 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition in ghost/core/core/server/lib/request-external.js. An attacker can make the Ghost server connect to internal-network hosts by supplying an external URL that resolves to a public address during the initial check and then rebinding to a private or loopback IP when the TCP connection is established. The vulnerable outbound fetch path relied on a pre-request DNS check in beforeRequest and beforeRedirect, which an attacker could race through features that issue external requests. This lets the attacker coerce Ghost into reaching protected internal services, exposing internal endpoints and enabling requests against network resources the user did not intend Ghost to contact.