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CVE-2016-4449
XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in…
- 7.1HighCVSS base score
- 1.7%Exploitation in 30 daysEPSS · top 23% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (resource consumption) via unspecified vectors.
Timeline
ID reserved
By redhat
- 38 days later
· 38 days later
Published
- 8 years later
· 8 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 | 3.0 | High7.1 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.7% · top 23% 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: High 7.1.
Affected products
n/a
- affected n/a
References
30
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.cybozu.com/ja-jp/article/9735 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://kc.mcafee.com/corporate/index?page=content&id=SB10170 (opens in a new tab)x_refsource_CONFIRMx_transferred
- SSA:2016-148-01 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- JVN#17535578 (opens in a new tab)third-party-advisoryx_refsource_JVNx_transferred
- RHSA-2016:1292 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [oss-security] 20160525 3 libxml2 issues (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-3593 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- APPLE-SA-2016-07-18-4 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- APPLE-SA-2016-07-18-3 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- APPLE-SA-2016-07-18-2 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- http://xmlsoft.org/news.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/HT206901 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2994-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- APPLE-SA-2016-07-18-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- JVNDB-2017-000066 (opens in a new tab)third-party-advisoryx_refsource_JVNDBx_transferred
- APPLE-SA-2016-07-18-6 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
- https://www.tenable.com/security/tns-2016-18 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 90865 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://git.gnome.org/browse/libxml2/commit/?id=b1d34de46a11323fccffa9fadeb33be670d602f5 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2016:2957 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://support.apple.com/HT206905 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1036348 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://support.apple.com/HT206903 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/HT206902 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/HT206904 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/HT206899 (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-2016-5438 (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)
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[](https://cveledger.app/cve/CVE-2016-4449)Record last updated .