CVE-2025-12084

6.3 mediumEPSS 0.8%

Medium (6.3) in python python. EPSS 0.8% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

6.3 medium

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

5.3 medium

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

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
CWE: CWE-407
Published: 2025-12-03
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

python:python

References

https://github.com/python/cpython/commit/027f21e417b26eed4505ac2db101a4352b7c51a0
https://github.com/python/cpython/commit/08d8e18ad81cd45bc4a27d6da478b51ea49486e4
https://github.com/python/cpython/commit/27648a1818749ef44c420afe6173af6868715437
https://github.com/python/cpython/commit/41f468786762348960486c166833a218a0a436af
https://github.com/python/cpython/commit/57937a8e5e293f0dcba5115f7b7a11b1e0c9a273

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