Vulnerability · NVD

CVE-2026-4224

CVE-2026-4224, high severity (CVSS 7.5): 3 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 7.5
Exploitation: 1.2 %
Tracked apps: 3
Still exposed: 0

Published on 2026-03-16

When an Expat parser with a registered ElementDeclHandler parses an inline
document type definition containing a deeply nested content model a C stack
overflow occurs.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

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

EPSS 1.21% above median percentile 67.2%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Python 3.12 Windows winget:Python.Python.3.12

Affected ≥3.13.0 <3.13.13 Fixed in 3.13.13 Latest tracked 3.12.10 patched
Python 3.13 Windows winget:Python.Python.3.13

Affected ≥3.13.0 <3.13.13 Fixed in 3.13.13 Latest tracked 3.13.15 patched

Observed affected builds (13)

3.13.12 3.13.11 3.13.10 3.13.9 3.13.8 3.13.7 3.13.6 3.13.5 3.13.4 3.13.3 3.13.2 3.13.1 3.13.0
Python 3.14 Windows winget:Python.Python.3.14

Affected ≥3.14.0 <3.14.4 Fixed in 3.14.4 Latest tracked 3.14.7 patched

Observed affected builds (4)

3.14.3 3.14.2 3.14.1 3.14.0

Vulnerable CPE configurations (10)

Vendor	Product	Platform	Versions	CPE 2.3 URI
python	python All platforms (wildcard)	All platforms (wildcard)	<3.10.0	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.13.0 <3.13.13	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.14.0 <3.14.4	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha1::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha2::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha3::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha4::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha5::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha6::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha7::::::

View on NVD ↗ Advisory · github.com

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