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Vulnerability details: VCID-qtp3-a1g7-8kgw
Vulnerability ID VCID-qtp3-a1g7-8kgw
Aliases CVE-2016-9318
Summary Improper Restriction of XML External Entity Reference libxml2, as used in XMLSec and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.
Status Published
Exploitability 0.5
Weighted Severity 6.0
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-611 Improper Restriction of XML External Entity Reference
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 6.7 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9318.json
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00121 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.0015 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.0015 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00175 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
epss 0.00175 https://api.first.org/data/v1/epss?cve=CVE-2016-9318
cvssv3.1 5.5 https://bugzilla.gnome.org/show_bug.cgi?id=772726
ssvc Track https://bugzilla.gnome.org/show_bug.cgi?id=772726
cvssv2 6.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 5.5 https://github.com/lsh123/xmlsec/issues/43
ssvc Track https://github.com/lsh123/xmlsec/issues/43
cvssv3.1 5.5 https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html
ssvc Track https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html
cvssv3.1 5.5 https://security.gentoo.org/glsa/201711-01
ssvc Track https://security.gentoo.org/glsa/201711-01
cvssv3.1 5.5 https://usn.ubuntu.com/3739-1/
ssvc Track https://usn.ubuntu.com/3739-1/
cvssv3.1 5.5 https://usn.ubuntu.com/3739-2/
ssvc Track https://usn.ubuntu.com/3739-2/
cvssv3.1 5.5 http://www.securityfocus.com/bid/94347
ssvc Track http://www.securityfocus.com/bid/94347
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9318.json
https://api.first.org/data/v1/epss?cve=CVE-2016-9318
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9318
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1395609 https://bugzilla.redhat.com/show_bug.cgi?id=1395609
43 https://github.com/lsh123/xmlsec/issues/43
844581 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=844581
94347 http://www.securityfocus.com/bid/94347
CVE-2016-9318 https://nvd.nist.gov/vuln/detail/CVE-2016-9318
show_bug.cgi?id=772726 https://bugzilla.gnome.org/show_bug.cgi?id=772726
USN-3739-2 https://usn.ubuntu.com/3739-2/
No exploits are available.
Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9318.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://bugzilla.gnome.org/show_bug.cgi?id=772726
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at https://bugzilla.gnome.org/show_bug.cgi?id=772726
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://github.com/lsh123/xmlsec/issues/43
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at https://github.com/lsh123/xmlsec/issues/43
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at https://lists.debian.org/debian-lts-announce/2022/04/msg00004.html
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://security.gentoo.org/glsa/201711-01
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at https://security.gentoo.org/glsa/201711-01
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://usn.ubuntu.com/3739-1/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at https://usn.ubuntu.com/3739-1/
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at https://usn.ubuntu.com/3739-2/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at https://usn.ubuntu.com/3739-2/
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Found at http://www.securityfocus.com/bid/94347
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-04T16:39:51Z/ Found at http://www.securityfocus.com/bid/94347
Exploit Prediction Scoring System (EPSS)
Percentile 0.31068
EPSS Score 0.00121
Published At April 12, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:47:06.966926+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/libxml2/CVE-2016-9318.yml 38.0.0