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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85733
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-13 17:17:47 UTC
Updated2026-10-16 20:04:29 UTC
DescriptionFrankenPHP 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.002440000 probability, percentile 0.145550000 (date 2026-10-16)

Problem Types: CWE-200 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Php Frankenphp affected < 1.12.5 Not specified

References

ReferenceSourceLinkTags
github.com/php/frankenphp/commit/17940ff2ee188a1e48aabd10c095df72b42539e0 [email protected] github.com
github.com/php/frankenphp/security/advisories/GHSA-cj57-c655-p798 [email protected] github.com
github.com/php/frankenphp/releases/tag/caddy/v1.12.5 [email protected] github.com
github.com/php/frankenphp/pull/2524 [email protected] github.com
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