CVE-2015-8866

php: libxml_disable_entity_loader setting is shared between threads

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Severity

Low

Red Hat Product Security

3.7

CVSS 3.0

Review impact separately from score.

Published · April 21, 2016

Updated · June 28, 2026

Description

ext/libxml/libxml.c in PHP before 5.5.22 and 5.6.x before 5.6.6, when PHP-FPM is used, does not isolate each thread from libxml_disable_entity_loader changes in other threads, which allows remote attackers to conduct XML External Entity (XXE) and XML Entity Expansion (XEE) attacks via a crafted XML document, a related issue to CVE-2015-5161.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 3.7
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS 2.0 · 4.3
AV:N/AC:M/Au:N/C:N/I:P/A:N

CWE not specified