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Servers and applications

CVE-2025-12084

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
Medium 6.3
Published
3 Dec 2025
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.13.11, 3.14.2
Sources
NVD

Affected software

SoftwareAffected versions
PythonServers and applications · cpe:a:python:python
  • Every version before 3.13.11
  • From 3.14.0 before 3.14.2
  • Version 3.15.0-alpha1
  • Version 3.15.0-alpha2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-12084
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12084