CVE-2026-57584 Details
Description
Phalcon is a high-performance, full-stack PHP framework. Prior to 5.15.0, every Phalcon MVC application built with a default router registers a built-in route whose compiled PCRE pattern contains the nested quantifier (/.), and the same construct is produced by the /:params placeholder and the CLI router. Phalcon\Mvc\Router::handle() matches this pattern against the attacker-controlled request URI on every request, so a crafted path such as one containing repeated slashes followed by decoded newlines can trigger catastrophic backtracking and cause CPU exhaustion or route-matching failure. This issue is fixed in version 5.15.0.
A denial-of-service vulnerability has been identified in the Phalcon PHP framework, specifically in versions prior to 5.15.0. The issue arises in MVC applications using the default router, which automatically registers a route with a compiled PCRE pattern that includes a nested quantifier. This pattern can be exploited by sending a crafted request URI that causes catastrophic backtracking, leading to significant CPU exhaustion. The vulnerability is also present in the CLI router, under similar conditions.
Users can update to Phalcon version 5.15.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 10, 2026CISA-ADP
Assessed Jul 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/phalcon/cphalcon/security/advisories/GHSA-x7rj-f32v-7jjg | CISA-ADP | AdvisoryRemedyVendor |
| https://github.com/phalcon/cphalcon/commit/14ba22d389d5ca620bb9d5207205f836ef1224f2 | [email protected] | Source CodeVendor |
| https://github.com/phalcon/cphalcon/commit/fa798e919cb2c487062bb9899ad6fc2b673b3a67 | [email protected] | Source CodeVendor |
| https://github.com/phalcon/cphalcon/releases/tag/v5.15.0 | [email protected] | Release NotesVendor |
| https://github.com/phalcon/cphalcon/security/advisories/GHSA-x7rj-f32v-7jjg | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1333 | Inefficient Regular Expression Complexity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Phalcon | <= 5.14.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 13, 2026 | CVE Modified | CISA-ADP |
| Jul 10, 2026 | New CVE Received | [email protected] |