🛡️ CVE-2026-53947 — ghost
Description
Ghost: Member existence leak via magic link sign-in response
Impact
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.
Vulnerable versions
This vulnerability is present in Ghost from v5.18.0 up to v6.21.0.
Patches
v6.21.1 contains a fix for this issue.
How to update
For self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost).
If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update).
For more information
If you have any questions or comments about this advisory, email Ghost at [security@ghost.org](mailto:[email protected]).
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.
Affected software
CVE-2026-53947 is recorded against 2 packages.
- ghost
- unknown
Timeline and source
Published on 30 June 2026 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| ghost | — | — |
| unknown | — | — |
References
Similar Threats
- Critical CVE-2024-34451
- Critical CVE-2024-23724
- High CVE-2024-34448
- High CVE-2024-34559
- High CVE-2020-8134
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
Vulnerability Monitoring
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