TI-2015-07296 Aliases CVE-2015-8866 GHSA-x5qj-644j-7xc7

ext/libxml/libxml.c in PHP before 5.5.22 and 5.6.x before 5.6.6, when PHP-FPM is used…

MEDIUM 48CWE-611Published 2016-05-22 · Updated 2024-08-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 7 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.04171 90th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Partial Red Hat: 1 advisoryRed Hat: 7 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPE	Versions	Role	Vendor
cpe:2.3:a:php:php::::::::	5.5.0 to before 5.5.22; 5.6.0 to before 5.6.6; 7.0.0 to before 7.0.27; 7.1.0 to before 7.1.13; 7.2.0 to before 7.2.1	Vulnerable	PHP
cpe:2.3:o:canonical:ubuntu_linux:12.04::::-:::	12.04	Vulnerable	Canonical
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::	14.04	Vulnerable	Canonical
cpe:2.3:o:canonical:ubuntu_linux:15.10:::::::*	15.10	Vulnerable	Canonical
cpe:2.3:o:opensuse:leap:42.1:::::::*	42.1	Vulnerable	openSUSE
cpe:2.3:o:opensuse:opensuse:13.2:::::::*	13.2	Vulnerable	openSUSE
cpe:2.3:o:suse:linux_enterprise_module_for_web_scripting:12:::::::*	12	Vulnerable	SUSE
cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:-::::::	12	Vulnerable	SUSE
cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:sp1::::::	12 sp1	Vulnerable	SUSE

cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 5.5.0 to before 5.5.22; 5.6.0 to before 5.6.6; 7.0.0 to before 7.0.27; 7.1.0 to before 7.1.13; 7.2.0 to before 7.2.1 Vulnerable ·PHP
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* Versions 15.10 Vulnerable ·Canonical
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* Versions 42.1 Vulnerable ·openSUSE
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Versions 13.2 Vulnerable ·openSUSE
cpe:2.3:o:suse:linux_enterprise_module_for_web_scripting:12:*:*:*:*:*:*:* Versions 12 Vulnerable ·SUSE
cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:-:*:*:*:*:*:* Versions 12 Vulnerable ·SUSE
cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:sp1:*:*:*:*:*:* Versions 12 sp1 Vulnerable ·SUSE

Remediation

Red Hat 1 advisory

RHSA-2016:2750 Released 2016-11-15 · Red Hat rating Moderate
rh-php56 security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 5	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 7	Affected	No fix planned: Will not fix
Red Hat Software Collections	Affected	No fix planned: Will not fix
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)	Fixed	RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)	Fixed	RHSA-2016:2750

Timeline

2026-10-02 Threatist record created from CVE-2015-8866
2026-10-03 Alias added: GHSA-x5qj-644j-7xc7

References

Exploit 1

https://bugs.php.net/bug.php?id=64938

Patch 2

Advisory 7

Other 1

http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=de31324c221c1791b26350ba106cc26bad23ace9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences