CVE-2026-57584

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.

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Weakness Type (CWE)

CWE-1333 CWE-1333

References

Other References

https://github.com/phalcon/cphalcon/commit/14ba22d389d5ca620bb9d5207205f836ef1224f2 https://github.com/phalcon/cphalcon/commit/fa798e919cb2c487062bb9899ad6fc2b673b3a67 https://github.com/phalcon/cphalcon/releases/tag/v5.15.0 https://github.com/phalcon/cphalcon/security/advisories/GHSA-x7rj-f32v-7jjg

Frequently Asked Questions

What is CVE-2026-57584? +

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.

How do I check if I'm vulnerable to CVE-2026-57584? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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