Public proof of conceptFix available

CVE-2016-3627

A public proof of concept exists; no exploitation attested.

Published2016-05-17
WeaknessCWE-674

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The xmlStringGetNodeList function in tree.c in libxml2 2.9.3 and earlier, when used in recovery mode, allows context-dependent attackers to cause a denial of service (infinite recursion, stack consumption, and application crash) via a crafted XML document.

Timeline

dates in UTC

2016-05-1714:08CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-3627?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-3627?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Redhat enterprise linux eus

Branch	Affected	Fixed in	Source
7.2	= 7.2	no fix published	NVD
7.3	= 7.3	no fix published	NVD
7.4	= 7.4	no fix published	NVD
7.5	= 7.5	no fix published	NVD
7.6	= 7.6	no fix published	NVD
7.7	= 7.7	no fix published	NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
12.4	= 12.04	no fix published	NVD
14.4	= 14.04	no fix published	NVD
15.10	= 15.10	no fix published	NVD
16.4	= 16.04	no fix published	NVD

Redhat enterprise linux server aus

Branch	Affected	Fixed in	Source
7.2	= 7.2	no fix published	NVD
7.4	= 7.4	no fix published	NVD
7.6	= 7.6	no fix published	NVD

11 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedOneton429/CVE-2016-3627

Sources

CISA-ADPSSVC decisionnone2025-06-04
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.52025-06-04
NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CISA-ADPweakness (CWE)CWE-6742025-06-04
NVDweakness (CWE)CWE-674read 2026-10-23
FIRST EPSSEPSS score7.0 %2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2016-05-17
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-3627?

Is CVE-2016-3627 actively exploited?

Active exploitation of CVE-2016-3627 has not been confirmed. Its EPSS score was 7.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-3627?

CVE-2016-3627 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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