{"id":"GHSA-jx35-x7fj-vgpr","revision":"c0a1e4b4bb0d4bbebef1e8dc339f8fc8","records":[{"revision":"c0a1e4b4bb0d4bbebef1e8dc339f8fc8","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-jx35-x7fj-vgpr","aliases":["BIT-ghost-2026-53949","CVE-2026-53949"],"title":"Ghost Content API filter bypass reveals private fields","description":"### Impact\n\nThe validation applied to filters on the public API endpoints could be partially bypassed, making it possible to reveal private fields via a brute force attack. If SQLite was used as the database password hashes were fully accessible. If MySQL was used as the database the password hashes' case (uppercase / lowercase) would have been lost, which would likely have rendered a further brute force attack on the discovered hashes fruitless.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v5.46.1 up to v6.21.1.\n\n### Patches\n\nv6.21.2 contains a fix for this issue.\n\n### How to update\n\nFor 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). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### Workarounds\n\nIf upgrading immediately is not possible, block or filter requests to Content API endpoints where the `filter` query parameter contains `password` or `email` (including any compound form such as `users.password`, `users.email`, `authors.password`, `authors.email`). Reject requests at a reverse proxy / WAF layer before they reach Ghost.\n\nExample (case-insensitive) pattern to block on the raw querystring:\n\n```\nfilter=[^&]*(password|email)\n```\n\n### References\n\nGhost thanks crnkovic for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email Ghost at [security@ghost.org](mailto:security@ghost.org).","state":0,"publishedAt":"2026-08-05T14:42:47+00:00","modifiedAt":"2026-08-05T14:45:20.4999882+00:00","affected":[{"ecosystem":"npm","name":"ghost","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"5.46.1"},{"kind":"fixed","version":"6.21.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/TryGhost/Ghost/security/advisories/GHSA-jx35-x7fj-vgpr","https://nvd.nist.gov/vuln/detail/CVE-2026-53949","https://github.com/TryGhost/Ghost","https://github.com/TryGhost/Ghost/releases/tag/v6.21.2"],"sourceUrl":"https://github.com/advisories/GHSA-jx35-x7fj-vgpr","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jx35-x7fj-vgpr","identifiers":["GHSA-jx35-x7fj-vgpr","BIT-ghost-2026-53949","CVE-2026-53949"]},"retained":false,"historicalAffected":[]}],"coverage":[]}