CVE-2025-12084

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.

Affected Platforms

Weakness Type

CWE-407

References

• https://github.com/python/cpython/commit/027f21e417b26eed4505ac2db101a4352b7c51a…
• https://github.com/python/cpython/commit/08d8e18ad81cd45bc4a27d6da478b51ea49486e…
• https://github.com/python/cpython/commit/27648a1818749ef44c420afe6173af686871543…
• https://github.com/python/cpython/commit/41f468786762348960486c166833a218a0a436a…
• https://github.com/python/cpython/commit/57937a8e5e293f0dcba5115f7b7a11b1e0c9a27…
• https://github.com/python/cpython/commit/8d2d7bb2e754f8649a68ce4116271a4932f7690…