🛡️ CVE-2026-53947 — ghost

🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-204 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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

github.com (Web)
nvd.nist.gov (Web)

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE CWE-204
Public Exploit ✅ No
Source NVD
Published 2026-06-30
Updated 2026-08-12
Modified 2026-08-04
Fix URL N/A

Affected Packages

Software From version Fixed in
ghost
unknown

Similar Threats

Vulnerability Monitoring

Track new vulnerabilities in ghost

CVE-2026-53947 is rated CVSS 5.3 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.

Set Up Free Alerts →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.