Skip to content
Heist/ feed
Medium

FrankenPHP: Docker images serve phpinfo() as the default index.php, leaking environment variables

Type: advisorySource: Official CVE List1 source record

FrankenPHP is a modern application server for PHP. Prior to 1.12.5, the official FrankenPHP Debian and Alpine Docker images include a default /app/public/index.php that executes phpinfo(). A derived image that does not overwrite this placeholder serves the diagnostics page in production and can disclose environment variables used for secrets, PHP configuration directives, loaded extensions, software versions, and system paths. Images built using the documented pattern with their own /app/public/index.php are not affected, and already derived images must be rebuilt or supplied with an application index to remove the exposed placeholder. This issue is fixed in version 1.12.5.

Announced Source revision 1
Original source ↗

CVE-2026-85733

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-85733

frankenphp

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "php",
    "product": "frankenphp",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.12.5"
      }
    ]
  }
]
Related CVEs
CVE-2026-85733

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#20530 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement