Medium severity5.8NVD Advisory· Published Jun 24, 2026· Updated Jun 25, 2026
CVE-2026-53944
CVE-2026-53944
Description
Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1.
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Affected products
2Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-wvp2-4qqp-4h3rghsaADVISORY
- github.com/TryGhost/Ghost/commit/9b7f2212970fade08ecbec543b405190471e38d4ghsa
- github.com/TryGhost/Ghost/pull/26749ghsa
- github.com/TryGhost/Ghost/releases/tag/v6.21.1ghsa
- github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3rnvd
- nvd.nist.gov/vuln/detail/CVE-2026-53944ghsa
News mentions
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