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HighVulnerabilityCVE-2026-59978updated 30 Oct 2026, 19:19 UTC

AdminNeo database tool can be crashed by a crafted web request

A remote visitor can send one specially crafted request that makes the AdminNeo login and pages fail with server errors for all users for up to a day. Nothing is stolen, but the tool becomes unusable until the bad data is cleared or the sof

Fixed in 5.5.0 · out Official, 2 sources
SeverityHighCVSS 7.5 of 10
Being exploited?UnclearNo reports either way yet
Fix available?Yes5.5.0 · since 30 Oct 2026
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1AttackerSends crafted POST to version endpoint
  2. 2Cache poisonedversion[] array saved to shared temp file
  3. 3Page loadCached value passed to rawurlencode()
  4. 4TypeErrorPHP throws fatal error on every request
  5. ResultAdminNeo returns HTTP 500 to all users

What happened

The unauthenticated ?script=version endpoint accepts POST data without origin, CSRF, or type validation. A version[] array is stored in the shared adminneo.version cache and later passed to rawurlencode(), causing a PHP TypeError and HTTP 500 responses.

Why it is dangerous: Anyone who can reach an AdminNeo instance over the network can take it offline for all users for about 24 hours, which hits administrators and anyone relying on database access through it.

Are you affected?

You are affected if you run AdminNeo from version 4.6.2 up to but not including 5.5.0 on a PHP web server that can write to the shared temp directory.

Package / productAffected versionsFixed in
adminneo-org/adminneo · composer>= 4.6.2, < 5.5.05.5.0

What to do

  1. Update adminneo-org/adminneo to version 5.5.0 or later
  2. If you cannot update now, make the adminneo.version file in the PHP temp directory unwritable by the web server
  3. Check that AdminNeo instances are not exposed to untrusted networks while you update

Timeline

  1. 30 Oct 2026, 18:53 UTC
    Publicly disclosed
  2. 30 Oct 2026, 18:53 UTC
    Reported by GitHub Advisory · GitHub Advisory
  3. 30 Oct 2026, 18:53 UTC
    Picked up by Zero Radar
  4. 30 Oct 2026, 19:19 UTC
    NVD reported on it · NVD

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-59978 · GHSA-jm85-8cpp-9cjc
CVSS
7.5 / 10
Disclosed
30 Oct 2026, 18:53 UTC
On Zero Radar
30 Oct 2026, 18:53 UTC (1 min after disclosure)
Last change
30 Oct 2026, 19:19 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

AdminNeo database tool can be crashed by a crafted web request · Zero Radar