CVE-2025-12084

5.3 MEDIUM

Published: December 03, 2025 Modified: December 22, 2025

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/python/cpython/commit/027f21e417b26eed4505ac2db101a4352b7c51a0

Source: cna@python.org

Patch

https://github.com/python/cpython/commit/08d8e18ad81cd45bc4a27d6da478b51ea49486e4

Source: cna@python.org

Patch

https://github.com/python/cpython/commit/27648a1818749ef44c420afe6173af6868715437

Source: cna@python.org

https://github.com/python/cpython/commit/8d2d7bb2e754f8649a68ce4116271a4932f76907

Source: cna@python.org

https://github.com/python/cpython/commit/9c9dda6625a2a90d2a06c657eee021d6be19842d

Source: cna@python.org

https://github.com/python/cpython/commit/a696ba8b4d42fd632afc9bc88ad830a2e4cceed8

Source: cna@python.org

https://github.com/python/cpython/commit/ddcd2acd85d891a53e281c773b3093f9db953964

Source: cna@python.org

Patch

https://github.com/python/cpython/issues/142145

Source: cna@python.org

Issue Tracking Patch

https://github.com/python/cpython/pull/142146

Source: cna@python.org

Issue Tracking Patch

9 reference(s) from NVD

Quick Stats

CVSS v3 Score

5.3 / 10.0

EPSS (Exploit Probability)

0.2%

37th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-407

Affected Vendors

python

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