Medium 5.0Published Nov 4, 2014

CVE-2014-3660parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects xmlsoft libxml2 and 4 other products. Add what you run to find out whether that includes you.

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parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the "billion laughs" attack.

CVSS: 5.0 MEDIUM (v2.0, NVD)AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

xmlsoft libxml2 xmlsoft:libxml2	through 2.9.1; 2.0.0; 2.1.0; 2.1.1; 2.2.0; 2.2.0; 2.2.1; 2.2.2; and 102 more ranges	NVD
apple mac_os_x apple:mac_os_x	through 10.10.4	NVD
canonical ubuntu_linux canonical:ubuntu_linux	10.04; 12.04; 14.04	NVD
debian debian_linux debian:debian_linux	7.0	NVD
redhat enterprise_linux redhat:enterprise_linux	5.0	NVD

References

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
http://lists.apple.com/archives/security-announce/2015/Aug/msg00002.html
http://lists.opensuse.org/opensuse-updates/2014-10/msg00034.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html
http://rhn.redhat.com/errata/RHSA-2014-1655.html
http://rhn.redhat.com/errata/RHSA-2014-1885.html
http://secunia.com/advisories/59903
http://secunia.com/advisories/61965
http://secunia.com/advisories/61966
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.