{"id":"CVE-2026-59978","state":"PUBLISHED","title":"AdminNeo: version-cache array injection causes persistent denial of service","description":"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.","publishedAt":"2026-10-30T18:53:04.957Z","updatedAt":"2026-10-30T19:50:24.134Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["adminneo-org adminneo"],"affected":[{"vendor":"adminneo-org","product":"adminneo","versions":[{"version":">= 4.6.2, < 5.5.0","status":"affected"}]}],"references":["https://github.com/adminneo-org/adminneo/security/advisories/GHSA-jm85-8cpp-9cjc","https://github.com/adminneo-org/adminneo/commit/b7ae929e6afb374f0a7aba3d73b7d441470ff907","https://github.com/adminneo-org/adminneo/releases/tag/v5.5.0"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-30T20:00:06.831Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59978.json","commit":"c38e2e77a87db0e463f8aa35621676635c6b16df","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59978","state":"PUBLISHED","datePublished":"2026-10-30T18:53:04.957Z","dateUpdated":"2026-10-30T19:50:24.134Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-07T19:41:00.004Z"},"containers":{"cna":{"title":"AdminNeo: version-cache array injection causes persistent denial of service","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"adminneo-org","product":"adminneo","versions":[{"version":">= 4.6.2, < 5.5.0","status":"affected"}]}],"references":[{"url":"https://github.com/adminneo-org/adminneo/security/advisories/GHSA-jm85-8cpp-9cjc","name":"https://github.com/adminneo-org/adminneo/security/advisories/GHSA-jm85-8cpp-9cjc","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/adminneo-org/adminneo/commit/b7ae929e6afb374f0a7aba3d73b7d441470ff907","name":"https://github.com/adminneo-org/adminneo/commit/b7ae929e6afb374f0a7aba3d73b7d441470ff907","tags":["x_refsource_MISC"]},{"url":"https://github.com/adminneo-org/adminneo/releases/tag/v5.5.0","name":"https://github.com/adminneo-org/adminneo/releases/tag/v5.5.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-30T18:53:04.957Z"},"source":{"advisory":"GHSA-jm85-8cpp-9cjc","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T19:47:01.562162Z","id":"CVE-2026-59978","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-30T19:50:24.134Z"}}]}}}