CVE-2026-85733
MEDIUM 5.3FrankenPHP 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 15th percentile
Impact if exploited
5.3CVSS 3.1 · MEDIUM
- ConfidentialityLow
- IntegrityNone
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-200: : Exposure of Sensitive Information to an Unauthorized Actor
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References and research data (JSON)
All CVSS metrics
- MEDIUM 5.3 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - MEDIUM 5.3 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-98915 EUVD · EUVD-2026-98915
Technical & other
- https://github.com/php/frankenphp/security/advisories/GHSA-cj57-c655-p798 CVE record · GitHub_M · Updated 2026-10-13T16:23:07.177Z
NVD · CVE-2026-85733 · Updated 2026-10-16T20:04:29.760 - https://github.com/php/frankenphp/pull/2524 CVE record · GitHub_M · Updated 2026-10-13T16:23:07.177Z
NVD · CVE-2026-85733 · Updated 2026-10-16T20:04:29.760 - https://github.com/php/frankenphp/commit/17940ff2ee188a1e48aabd10c095df72b42539e0 CVE record · GitHub_M · Updated 2026-10-13T16:23:07.177Z
NVD · CVE-2026-85733 · Updated 2026-10-16T20:04:29.760 - https://github.com/php/frankenphp/releases/tag/caddy/v1.12.5 CVE record · GitHub_M · Updated 2026-10-13T16:23:07.177Z
NVD · CVE-2026-85733 · Updated 2026-10-16T20:04:29.760