Ghost: Authorization Bypass in Comments Feature

### Impact An input validation issue allowed members to access comments they were not authorized to access. ### Vulnerable versions This vulnerability is present in Ghost from v5.9.0 up to v6.44.1. ### Patches v6.44.1 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). ### References Ghost thanks [Himanshu Anand](https://github.com/unknownhad) ([@anand_himanshu](https://twitter.com/anand_himanshu)) for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email us at [[email protected]](mailto:[email protected]).

Source published

7 Oct 2026 16:18:00 UTC

Source modified

13 Oct 2026 08:25:39 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Publisher rating · MODERATE