CVE-2026-53949 — Ghost Content API filter bypass reveals private fields

Description (CNA)

Ghost is a Node.js content management system. From 5.46.1 until 6.21.2, the 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. This vulnerability is fixed in 6.21.2.

Affected (CNA)

Vendor / product	Versions
TryGhost / Ghost	affected >= 5.46.1, < 6.21.2

CWE

CWE-200, CWE-693

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-jx35-x7fj-vgpr

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.