Vulnerability · NVD

CVE-2026-6019

MEDIUM 6.1 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 0.23% exploit very unlikely percentile 13.8%

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

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