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    CVE-2015-8866

    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.

    Published:Apr 21, 2016
    Last Modified:Apr 12, 2025
    EPS:May 22, 2016
    EPSS Score:0.01976
    CVSS Score:9.6

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Opensuse
    Product
    Leap
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Php
    Product
    Php
    Vendor
    Redhat
    Product
    Rhel Software Collections
    Vendor
    Suse
    Product
    Linux Enterprise Module For Web Scripting
    Vendor
    Suse
    Product
    Linux Enterprise Software Development Kit

    Exploits

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

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-221 Data Serialization External Entities Blowup

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=de31324c221c1791b26350ba106cc26bad23ace9
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00031.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00033.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00056.html
    http://rhn.redhat.com/errata/RHSA-2016-2750.html
    http://www.openwall.com/lists/oss-security/2016/04/24/1
    http://www.php.net/ChangeLog-5.php
    http://www.securityfocus.com/bid/87470
    http://www.ubuntu.com/usn/USN-2952-1
    http://www.ubuntu.com/usn/USN-2952-2
    https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1509817
    https://bugs.php.net/bug.php?id=64938
    http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=de31324c221c1791b26350ba106cc26bad23ace9
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00031.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00033.html
    http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00056.html
    http://rhn.redhat.com/errata/RHSA-2016-2750.html
    http://www.openwall.com/lists/oss-security/2016/04/24/1
    http://www.php.net/ChangeLog-5.php
    http://www.securityfocus.com/bid/87470
    http://www.ubuntu.com/usn/USN-2952-1
    http://www.ubuntu.com/usn/USN-2952-2
    https://bugs.launchpad.net/ubuntu/+source/php5/+bug/1509817
    https://bugs.php.net/bug.php?id=64938

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High