CVE-2025-12084
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-03

Last updated on: 2025-12-16

Assigner: Python Software Foundation

Description
When building nested elements using xml.dom.minidom methods such as appendChild() that have a dependency on _clear_id_cache() the algorithm is quadratic. Availability can be impacted when building excessively nested documents.
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Meta Information
Published
2025-12-03
Last Modified
2025-12-16
Generated
2026-06-16
AI Q&A
2025-12-03
EPSS Evaluated
2026-06-14
NVD
CVE-2025-12084
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
python python From 3.13.1 (inc) to 3.13.11 (inc)
python python From 3.13.1 (inc) to 3.13.11 (inc)
python python 3.15.0
python python 3.15.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-407 An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
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Executive Summary

This vulnerability occurs in the xml.dom.minidom module when building nested XML elements using methods like appendChild(). The underlying algorithm depends on _clear_id_cache() and has a quadratic time complexity, which means that as the nesting depth increases, the processing time grows significantly. This can lead to performance degradation and impact availability when excessively nested XML documents are constructed.

Impact Analysis

The vulnerability can impact availability by causing significant performance issues when processing or building XML documents with deep nesting. This may lead to slowdowns or denial of service conditions in applications relying on xml.dom.minidom for XML manipulation.

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