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CVE-2016-9318

16
FAUCET Score

CVE-2016-9318 describes a vulnerability in libxml2 versions 2.9.4 and earlier, including its use in XMLSec 1.2.23, which affects products from Canonical, XMLSec Project, and XMLSoft. This flaw facilitates XML External Entity (XXE) attacks due to the library's lack of a direct flag to restrict file access while allowing document parsing. With a CVSS score of 5.5 (Medium), successful exploitation requires user interaction (UI:R) via a crafted document, potentially leading to high confidentiality impact (C:H) through local file disclosure. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.9.4CPE matchmatch criteria
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.94%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0294 is in the 95th percentile among its peer group of 5,757 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCS
View patch
redhatno patchvia redhat_api
Product: Red Hat JBoss Core ServicesFixed in: httpd
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libxml2

Vendor Advisories (1)

redhatCVE-2016-9318Moderate

libxml2: XML External Entity vulnerability

Oct 6, 2016

References

bugzilla.gnome.org / show_bug.cgi
Issue TrackingPatchThird Party AdvisoryVDB Entry
github.com / lsh123/xmlsec/issues/43
ExploitPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2022/04/msg00004.html
security.gentoo.org / glsa/201711-01
Third Party Advisory
usn.ubuntu.com / 3739-1
Third Party Advisory
usn.ubuntu.com / 3739-2
Third Party Advisory
securityfocus.com / bid/94347
Third Party AdvisoryVDB Entry