CVE-2026-59978: AdminNeo · version-cache array injection causes persistent denial of service
Affects adminneo-org/adminneoSource GCVE Database
Not known to be exploited · CVSS 7.5 High : upgrade to 5.5.0 soon.
Data as of 30 Oct 2026, 20:35 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 5.5.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade adminneo-org/adminneo to 5.5.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Packagistadminneo-org/adminneo | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
An official fix is available in AdminNeo version 5.5.0. Users should upgrade to this version to resolve the vulnerability. As a workaround, if upgrading is not immediately possible, make the `adminneo.version` file in the temporary directory unwritable by the web server to prevent caching of malicious input. Manual deletion of the poisoned cache file (`/tmp/adminneo.version`) also restores service. No other actions are required.
Description
AdminNeo versions from 4.6.2 up to but not including 5.5.0 have a vulnerability in the `?script=version` endpoint that allows an attacker to cause a persistent denial of service. The endpoint accepts POST requests without origin or type validation, allowing an attacker to send a `version[]` parameter that PHP interprets as an array. This causes a type error in the server's cookie-setting function, resulting in HTTP 500 errors for all users for up to 24 hours until the cached version file expires or is deleted.
References
- github.com/adminneo-org/adminneo/security/advisories/GHSA-jm85-8cpp-9cjc (opens in a new tab)
- github.com/adminneo-org/adminneo/commit/b7ae929e6afb374f0a7aba3d73b7d441470ff907 (opens in a new tab)
- github.com/adminneo-org/adminneo (opens in a new tab)
- github.com/adminneo-org/adminneo/releases/tag/v5.5.0 (opens in a new tab)