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CVE-2025-13836

nvd nist
Published: Dec 1, 2025Modified: Sep 3, 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
version < 3.10.20
Python
3.11.0 ≤ version < 3.11.15
Python
3.12.0 ≤ version < 3.12.13
Python
3.13.0 ≤ version < 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.