Vulnerability · NVD

CVE-2026-6019

CVE-2026-6019, medium severity (CVSS 6.1): 3 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 6.1
Exploitation: 0.6 %
Tracked apps: 3
Still exposed: 0

Published on 2026-04-22

http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.

Attack vector : Network No privileges required

Show raw CVSS vector

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

EPSS 0.58% exploit very unlikely percentile 45.5%

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 - Fixed in - Latest tracked 3.12.10 undetermined
Python 3.13 Windows winget:Python.Python.3.13

Affected <3.13.14 Fixed in 3.13.14 Latest tracked 3.13.15 patched

Observed affected builds (14)

3.13.13 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 (5)

3.14.4 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)	<3.13.14	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::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.15.0:alpha8::::::

View on NVD ↗ Advisory · mail.python.org Advisory · github.com

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