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CVE-2014-3660
parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows…
- 5.0MediumCVSS base score
- 3.8%Exploitation in 30 daysEPSS · top 10.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By redhat
- 6 months later
· 6 months later
Published
- 10 years later
· 10 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 3.8% · top 10.0% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
23
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 59903 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://www.ncsc.nl/actueel/nieuwsberichten/kwetsbaarheid-ontdekt-in-libxml2.html (opens in a new tab)x_refsource_MISCx_transferred
- DSA-3057 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://support.apple.com/kb/HT205030 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 70644 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- openSUSE-SU-2014:1330 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bugzilla.redhat.com/attachment.cgi?id=944444&action=diff (opens in a new tab)x_refsource_MISCx_transferred
- 61966 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 61965 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- USN-2389-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- APPLE-SA-2015-08-13-2 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- APPLE-SA-2015-08-13-3 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- [oss-security] 20141017 libxml2 issue: billioun laughs variant (CVE-2014-3660) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- MDVSA-2014:244 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- RHSA-2014:1655 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2014:1885 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1149084 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 61991 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2015:2372 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://support.apple.com/kb/HT205031 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2014-3613 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2014-3660)Record last updated .