Vulnerability Description
AdminNeo is a full-featured database management tool written in PHP. From 4.6.2 until 5.5.0, the unauthenticated `?script=version` endpoint accepts POST data without origin, CSRF or parameter-type validation. A `version[]` parameter becomes a PHP array that `bootstrap.inc.php` serializes into the shared `adminneo.version` cache. On later page loads, `design.inc.php` passes that cached value to `cookie()` and `rawurlencode()`, causing a `TypeError` rather than encoding a version string. A remote attacker can make the instance return HTTP 500 to all users for the cache's twenty-four-hour lifetime or until the poisoned cache is removed. Exploitation requires the web server to be able to write that shared cache; making it unwritable is an interim workaround. The issue retains the underlying type-validation defect reported previously in Adminer despite changes to AdminNeo's version-checking flow. This issue is fixed in version 5.5.0.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/adminneo-org/adminneo/commit/b7ae929e6afb374f0a7aba3d73b7d441
- https://github.com/adminneo-org/adminneo/releases/tag/v5.5.0
- https://github.com/adminneo-org/adminneo/security/advisories/GHSA-jm85-8cpp-9cjc
FAQ
What is CVE-2026-59978?
CVE-2026-59978 is a vulnerability with a CVSS score of 7.5 (HIGH). AdminNeo is a full-featured database management tool written in PHP. From 4.6.2 until 5.5.0, the unauthenticated `?script=version` endpoint accepts POST data without origin, CSRF or parameter-type val...
How severe is CVE-2026-59978?
CVE-2026-59978 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59978?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.