Phalcon is a high-performance, full-stack PHP framework. In 5.15.0 and earlier, resolveFilter in phalcon/Mvc/View/Engine/Volt/Compiler.zep builds the join filter by inserting the raw separator and array token values into generated PHP without passing them through expression(). An attacker who can influence Volt template source can place quote-breaking content in a join argument, inject PHP into the compiled cache file, and execute it when Phalcon\Mvc\View\Engine\Volt::render() loads the template. This issue is fixed in version 5.16.0.

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Source ID Title
Github GHSA Github GHSA GHSA-hrwp-4hh9-c8r8 Phalcon Volt compiler `join` filter compile-time PHP code injection (SSTI leads to RCE)
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 21 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Phalcon
Phalcon cphalcon
Vendors & Products Phalcon
Phalcon cphalcon

Fri, 21 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
Description Phalcon is a high-performance, full-stack PHP framework. In 5.15.0 and earlier, resolveFilter in phalcon/Mvc/View/Engine/Volt/Compiler.zep builds the join filter by inserting the raw separator and array token values into generated PHP without passing them through expression(). An attacker who can influence Volt template source can place quote-breaking content in a join argument, inject PHP into the compiled cache file, and execute it when Phalcon\Mvc\View\Engine\Volt::render() loads the template. This issue is fixed in version 5.16.0.
Title Phalcon Volt compiler `join` filter compile-time PHP code injection (SSTI lead to RCE)
Weaknesses CWE-1336
CWE-94
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-21T20:25:44.767Z

Reserved: 2026-07-07T19:41:00.005Z

Link: CVE-2026-59989

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-21T21:17:00.713

Modified: 2026-08-21T21:17:00.713

Link: CVE-2026-59989

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T22:00:14Z

Weaknesses