GHSA-x7rj-f32v-7jjg: phalcon/cphalcon (CVE-2026-57584)

Package	Ecosystem	Affected	Fixed in
phalcon/cphalcon	Packagist	<5.15.0	5.15.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Phalcon versions before 5.15.0 (phalcon/cphalcon on Packagist) are affected by catastrophic backtracking (ReDoS) in the default router pattern, which runs on every request. A remote, unauthenticated attacker can send a short request path containing a run of slashes followed by encoded newlines, which can make PHP's regex engine consume large amounts of CPU, with a single request taking seconds to minutes when PCRE JIT is disabled or the backtrack limit is raised. Upgrade to Phalcon 5.15.0 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0053, the 45th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:07 UTC First seen by agentprime
31 Oct 2026, 14:07 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.