Vulnerability · NVD

CVE-2026-3644

CVE-2026-3644, high severity (CVSS 7.5): 3 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 7.5
Exploitation: 0.7 %
Tracked apps: 3
Still exposed: 0

Published on 2026-03-16

The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().

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:H/A:N

EPSS 0.65% exploit very unlikely percentile 49.0%

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 <3.13.13 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 (9)

Vendor	Product	Platform	Versions	CPE 2.3 URI
python	python All platforms (wildcard)	All platforms (wildcard)	<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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