GHSA-f4fj-q6m4-cc52: zendframework/zend-xmlrpc

Package	Ecosystem	Affected	Fixed in
zendframework/zend-xmlrpc	Packagist	>=2.1.0, <2.1.6 \|\| >=2.2.0, <2.2.6	2.1.6, 2.2.6

Machine-written summary

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

Packagist zendframework/zend-xmlrpc versions >=2.1.0, <2.1.6 and >=2.2.0, <2.2.6 are affected by XML external entity (XXE) injection and entity expansion (XEE) flaws, because PHP's DOMDocument, SimpleXML and xml_parse extensions accept external entities and recursive entity definitions by default. An attacker who can send XML to an application using the component can make it open arbitrary files or TCP connections, or exhaust CPU and memory for denial of service. Upgrade to version 2.1.6 or 2.2.6.

Written 4 Nov 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
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:28 UTC First seen by agentprime
31 Oct 2026, 14:28 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.