CVE-2026-128021

LOW 3.7

FrankenPHP before 1.13.2 Information Disclosure via libxml Error State in Worker Mode

CVSS Score

3.7

EPSS Score

0.0%

EPSS Percentile

0th

FrankenPHP before 1.13.2 contains an information disclosure vulnerability that allows later clients to read earlier clients' libxml errors because worker mode never resets LIBXML(error_list) between requests. Attackers sending requests to the same worker thread can call libxml_get_errors() or libxml_get_last_error() to obtain other clients' parsed-document fragments and server filesystem paths.

CWE	CWE-200
Vendor	php
Product	frankenphp
Ecosystems	PHP Web
Industries	Technology
Published	Nov 13, 2026

Stay Ahead of the Next One

Get instant alerts for php frankenphp

Be the first to know when new low vulnerabilities affecting php frankenphp are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

php / frankenphp

0 < 1.13.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/php/frankenphp/security/advisories/GHSA-4gfw-9v29-gp9h vulncheck.com: https://www.vulncheck.com/advisories/frankenphp-before-1.13.2-information-disclosure-via-libxml-error-state-in-worker-mode

Credits

🔍 manus-use alexandre-daubois