CVE-2026-57584: CWE-1333: Inefficient Regular Expression Complexity in phalcon cphalcon
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.
AI Analysis
Technical Summary
Phalcon MVC applications using the default router prior to version 5.15.0 register a built-in route with a compiled PCRE pattern containing nested quantifiers (/.), produced also by the /:params placeholder and the CLI router. The Router::handle() method matches this pattern against every incoming request URI, which is attacker-controlled. Crafted URIs with repeated slashes and decoded newlines can trigger catastrophic backtracking in the regex engine, causing excessive CPU usage or failure in route matching. This vulnerability is addressed in Phalcon version 5.15.0.
Potential Impact
An attacker can cause denial of service by sending specially crafted request URIs that exploit the inefficient regular expression, resulting in CPU exhaustion or failure of route matching. This can disrupt the availability of applications using vulnerable versions of Phalcon's router.
Mitigation Recommendations
Upgrade to Phalcon version 5.15.0 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Patch status is confirmed fixed in 5.15.0.
CVE-2026-57584: CWE-1333: Inefficient Regular Expression Complexity in phalcon cphalcon
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.
CVSS v4.0
Score 8.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Phalcon MVC applications using the default router prior to version 5.15.0 register a built-in route with a compiled PCRE pattern containing nested quantifiers (/.), produced also by the /:params placeholder and the CLI router. The Router::handle() method matches this pattern against every incoming request URI, which is attacker-controlled. Crafted URIs with repeated slashes and decoded newlines can trigger catastrophic backtracking in the regex engine, causing excessive CPU usage or failure in route matching. This vulnerability is addressed in Phalcon version 5.15.0.
Potential Impact
An attacker can cause denial of service by sending specially crafted request URIs that exploit the inefficient regular expression, resulting in CPU exhaustion or failure of route matching. This can disrupt the availability of applications using vulnerable versions of Phalcon's router.
Mitigation Recommendations
Upgrade to Phalcon version 5.15.0 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Patch status is confirmed fixed in 5.15.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-24T18:49:56.209Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a51650f68715ace433b3d1d
Added to database: 07/10/2026, 21:33:03 UTC
Last enriched: 07/18/2026, 15:30:35 UTC
Last updated: 08/23/2026, 22:52:12 UTC
Views: 77
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