medium5.3
CVE-2026-53947
Ghost: Member existence leak via magic link sign-in response
Impact
Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. This vulnerability is fixed in 6.21.1.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | ghost | >= 5.18.0, < 6.21.1 | 6.21.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-chgm-3698-jm42
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-chgm-3698-jm42
- https://nvd.nist.gov/vuln/detail/CVE-2026-53947
- https://github.com/TryGhost/Ghost/pull/26752
- https://github.com/TryGhost/Ghost/commit/fb2bb634653d99de68fc42d415721d755284fe30
- https://github.com/TryGhost/Ghost/releases/tag/v6.21.1