High
adminer — security advisory
Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs 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, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.
- Products
- adminer
- Affected versions
- 4.2.1-1, 4.2.1-1ubuntu1, 4.2.1-1ubuntu1+esm1, 4.3.1-2, 4.5.0-1, 4.6.1-1, 4.6.2-1, 4.6.2-1ubuntu0.1~esm1, 4.7.2-1, 4.7.4-1, 4.7.5-1, 4.7.6-1, 4.7.6-1ubuntu0.1~esm1, 4.7.9-2, 4.8.1-1, 4.8.1-1ubuntu1, 4.8.1-2, 4.8.1-4, 5.2.1+dfsg-1, 5.3.0+dfsg-1, 5.4.0+dfsg-1, 5.4.1+dfsg-1, 5.4.2+dfsg-1, 5.4.4+dfsg-1, 6.0.0-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-25892
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:56 UTC · Revision 1
Source evidence
Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs 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, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.
osv:UBUNTU-CVE-2026-25892
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
adminer
Fixed versions: Not specified
Complete source record
{
"id": "da9731e36aa6f9f0e79993438318f97878e51cf1005b8c98e77ab70dcff17b52",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-25892",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-25892",
"summary": "Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs 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, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.",
"evidence": "osv:UBUNTU-CVE-2026-25892",
"products": [
{
"name": {
"value": "adminer",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.2.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.2.1-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "4.2.1-1ubuntu1+esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-2",
"evidence": "/affected/1/versions"
},
{
"value": "4.5.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.6.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.6.2-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.6.2-1ubuntu0.1~esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.7.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.7.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.7.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.7.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "4.7.6-1ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.7.9-2",
"evidence": "/affected/3/versions"
},
{
"value": "4.8.1-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.8.1-1",
"evidence": "/affected/4/versions"
},
{
"value": "4.8.1-1ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "4.8.1-2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.8.1-4",
"evidence": "/affected/5/versions"
},
{
"value": "5.2.1+dfsg-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.4.1+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "5.4.2+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "5.4.4+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "6.0.0-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "adminer",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.1+dfsg-1",
"evidence": "/affected/7/versions"
},
{
"value": "5.3.0+dfsg-1",
"evidence": "/affected/7/versions"
},
{
"value": "5.4.0+dfsg-1",
"evidence": "/affected/7/versions"
},
{
"value": "5.4.1+dfsg-1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-25892",
"aliases": [
"UBUNTU-CVE-2026-25892"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"4.2.1-1",
"4.2.1-1ubuntu1",
"4.2.1-1ubuntu1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "4.2.1-1ubuntu1+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"4.3.1-2",
"4.5.0-1",
"4.6.1-1",
"4.6.2-1",
"4.6.2-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "4.6.2-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"4.7.2-1",
"4.7.4-1",
"4.7.5-1",
"4.7.6-1",
"4.7.6-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "4.7.6-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.7.9-2",
"4.8.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "4.8.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"4.8.1-1",
"4.8.1-1ubuntu1",
"4.8.1-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "4.8.1-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"4.8.1-4",
"5.2.1+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "5.2.1+dfsg-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"5.4.1+dfsg-1",
"5.4.2+dfsg-1",
"5.4.4+dfsg-1",
"6.0.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "6.0.0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "adminer",
"purl": "pkg:deb/ubuntu/adminer?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.2.1+dfsg-1",
"5.3.0+dfsg-1",
"5.4.0+dfsg-1",
"5.4.1+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25892.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "adminer",
"binary_version": "5.4.1+dfsg-1"
}
]
}
}
],
"modified": "2026-10-17T12:56:18.160413271Z",
"provider": "osv",
"upstream": [
"CVE-2026-25892"
],
"references": [
"https://ubuntu.com/security/CVE-2026-25892",
"https://www.cve.org/CVERecord?id=CVE-2026-25892",
"https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3",
"https://github.com/vrana/adminer/releases/tag/v5.4.2",
"https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh"
]
},
"related_cves": [
{
"value": "CVE-2026-25892",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355183,
"published_at": "2026-02-09T22:16:00+00:00"
}