Array injection in AdminNeo version cache enables denial of service
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
AdminNeo from 4.6.2 before 5.5.0 is a PHP database management tool. Its unauthenticated version endpoint does not validate parameter types, so a version[] array is stored in the shared version cache and later causes a TypeError (CWE-20). A remote attacker can make the instance return HTTP 500 to all users for the cache's twenty-four-hour lifetime, provided the web server can write that cache.
Written with Claude Haiku 5.5 from the sources below · 2026-10-31
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| adminneo-org | adminneo | 4.6.2 to before 5.5.0 | 5.5.0 | Patch available | CNA |
| — | adminneo-org/adminneo (Packagist) | 4.6.2 to before 5.5.0 | 5.5.0 | Patch available | GHSA-jm85-8cpp-9cjc |
- adminneo Vendoradminneo-org Affected 4.6.2 to before 5.5.0 Fixed in 5.5.0 Patch available CNA
- adminneo-org/adminneo (Packagist) Vendor— Affected 4.6.2 to before 5.5.0 Fixed in 5.5.0 Patch available GHSA-jm85-8cpp-9cjc
Remediation
Upgrade AdminNeo to version 5.5.0, which fixes this issue. The Packagist package adminneo-org/adminneo also lists 5.5.0 as its fixed version. As an interim workaround, make the shared adminneo.version cache unwritable by the web server.
Written with Claude Haiku 5.5 from the sources below · 2026-10-31
- Fix · CNA adminneo (adminneo-org) Fixed in 5.5.0
- Fix · GHSA-jm85-8cpp-9cjc adminneo-org/adminneo (Packagist) Fixed in 5.5.0 Advisory →
Timeline
- 2026-10-30 Threatist record created from CVE-2026-59978
- 2026-10-30 Alias added: GHSA-jm85-8cpp-9cjc
- 2026-10-30 Fix available: Packagist/adminneo-org/[email protected] · GHSA-jm85-8cpp-9cjc
- 2026-10-30 CVSS score added · GHSA-jm85-8cpp-9cjc
- 2026-10-30 Weakness changed · GHSA-jm85-8cpp-9cjc
- 2026-10-30 4 new references · GHSA-jm85-8cpp-9cjc
- 2026-10-30 CISA SSVC decision points changed
- 2026-10-30 Priority changed: MEDIUM → HIGH
References
Sources
- CVE-2026-59978 · CVE Program
- CVE-2026-59978 · NVD
- FIRST EPSS
- GHSA-jm85-8cpp-9cjc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences