Vulnerability · NVD

CVE-2025-13836

CVE-2025-13836, high severity (CVSS 7.5): 3 tracked apps concerned, 1 still exposed on its current version.

Severity (CVSS): 7.5
Exploitation: 1.6 %
Tracked apps: 3
Still exposed: 1

Published on 2025-12-01

When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS.

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 1.63% above median percentile 75.2%

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 ≥3.12.0 <3.12.13 Fixed in 3.12.13 Latest tracked 3.12.10 still vulnerable

Observed affected builds (11)

3.12.10 3.12.9 3.12.8 3.12.7 3.12.6 3.12.5 3.12.4 3.12.3 3.12.2 3.12.1 3.12.0
Python 3.13 Windows winget:Python.Python.3.13

Affected ≥3.13.0 <3.13.11 Fixed in 3.13.11 Latest tracked 3.13.15 patched

Observed affected builds (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 <3.10.20 Fixed in 3.10.20 Latest tracked 3.14.7 patched

Vulnerable CPE configurations (7)

Vendor	Product	Platform	Versions	CPE 2.3 URI
python	python All platforms (wildcard)	All platforms (wildcard)	<3.10.20	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.11.0 <3.11.15	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.12.0 <3.12.13	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.13.0 <3.13.11	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	-	cpe:2.3:a:python:python:3.14.0:-::::::
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::::::

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

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