Answer in brief
CVE-2026-59978 records a High severity (CVSS 7.5) vulnerability in AdminNeo: version-cache array injection causes persistent denial of service. The current sources do not mark it as known exploited. The current feed maps adminneo-org/adminneo (composer), adminneo-org/adminneo (composer), adminneo-org/adminneo (generic), adminneo-org/adminneo (packagist). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps adminneo-org/adminneo (composer), adminneo-org/adminneo (composer), adminneo-org/adminneo (generic), adminneo-org/adminneo (packagist). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| adminneo-org/adminneocomposer | >=4.6.2,<5.5.0 | 5.5.0 |
| adminneo-org/adminneocomposer | >=4.6.2,<5.5.0 | 5.5.0 |
| adminneo-org/adminneogeneric | >=4.6.2 <5.5.0 | 5.5.0 |
| adminneo-org/adminneopackagist | >=4.6.2 <5.5.0 | 5.5.0 |
Published upstream
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 30, 2026
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.
Quoted source text, attributed separately from HOL analysis.