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Vulnerability record · CVE-2026-59989 · published 21 August 2026

CVE-2026-59989: Code injection vulnerability

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.

9.2 CVSS 4.0 Critical EPSS 0.54% · top 56.7% CWE-94 · Code injectionCWE-1336 · CWE-1336 Received
9.2CVSS 4.0 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
27 Aug 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/phalcon/cphalcon/commit/e434061be3b7161930476c1368c868badc71e1bd
https://github.com/phalcon/cphalcon/pull/17217
https://github.com/phalcon/cphalcon/releases/tag/v5.16.0
https://github.com/phalcon/cphalcon/security/advisories/GHSA-hrwp-4hh9-c8r8

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Source: NIST National Vulnerability Database (record CVE-2026-59989), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.