AdminNeo: version-cache array injection causes persistent denial of service

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

• CVE-2026-59978: 0.65% estimated exploitation activity in the next 30 days; percentile 51.02 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary AdminNeo v5.4.1 gets the latest version from GitHub API in a browser JavaScript function. Version number is then sent by POST request to `?script=version`. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST `version[]` parameter which PHP converts to an array. On next page load, function `rawurlencode()` receives this array instead of string and throws `TypeError`, returning HTTP 500 to all users for the next 24 hours. Originally reported by @JoyGhoshs in Adminer: https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh Although the version checking process was modified in AdminNeo, the root cause persisted.

Workaround If you can't upgrade, make the file `adminneo.version` in temp directory (usually the value of upload_tmp_dir) unwritable by web server.

Details

1. Intended design of `?script=version` The endpoint is designed to receive version…

Published by the source

30 Oct 2026, 18:53 UTC

Last modified by the source

30 Oct 2026, 19:00 UTC

Source last checked

31 Oct 2026, 06:45 UTC

1. Revision 2 · amended · 31 Oct 2026

   Amended from osv record GHSA-jm85-8cpp-9cjc

2. Revision 1 · created · 30 Oct 2026

   Published from ghsa record GHSA-jm85-8cpp-9cjc

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# Patch Next advisory brief: CVE-2026-59978

Advisory: AdminNeo: version-cache array injection causes persistent denial of service
IDs: CVE-2026-59978, GHSA-jm85-8cpp-9cjc
Record: https://patchnext.com/advisories/cve-2026-59978 (revision 2, source checked 31 Oct 2026, 06:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: adminneo-org/adminneo 5.5.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist adminneo-org/adminneo: affected >= 4.6.2, < 5.5.0; fixed in 5.5.0

## Suggested inspection (read-only)
- Packagist adminneo-org/adminneo: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on adminneo-org/adminneo.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-jm85-8cpp-9cjc (GitHub-reviewed advisory GHSA-jm85-8cpp-9cjc lists affected ranges: Packagist adminneo-org/adminneo >=4.6.2 <5.5.0)
- Verified: https://osv.dev/vulnerability/GHSA-jm85-8cpp-9cjc (OSV record GHSA-jm85-8cpp-9cjc lists affected ranges: Packagist adminneo-org/adminneo >=4.6.2 <5.5.0 (fixed))

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