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CVE-2025-13836

nvd nist
Published: Dec 1, 2025Modified: Jun 17, 2026

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6.3
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less
Source: CNA (Secondary)

Description

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.

Affected (7)

Products: Python: Python
Python
1 product
Python
Configuration A
7 vulnerable
Vulnerable SoftwareAffected Versions
Python
Python
Before 3.10.20
Python
From 3.11.0 to 3.11.15
Python
From 3.12.0 to 3.12.13
Python
From 3.13.0 to 3.13.11
Python
Version 3.14.0
Python
Version 3.15.0 alpha1
Python
Version 3.15.0 alpha2

Related CWEs

CWE-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
CWE-400
Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (9)

Source: cna@python.org
Patch
Source: cna@python.org
Patch
Source: cna@python.org
Patch
Source: cna@python.org
Patch
Source: cna@python.org
Patch
Source: cna@python.org
Patch
Source: cna@python.org
Issue TrackingPatch
Source: cna@python.org
Issue TrackingPatch
Source: cna@python.org
Vendor Advisory

Timeline

No history available yet.