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Medium 5.3Published Dec 3, 2025
CVE-2025-12084When building nested elements using xml.dom.minidom methods such as appendChild() that have a dependency on _clear_id_cache() the algorithm is quadratic.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
python python python:python | before 3.13.11; from 3.14.0 before 3.14.2; 3.15.0; 3.15.0 | NVD |
References
- https://github.com/python/cpython/commit/027f21e417b26eed4505ac2db101a4352b7c51a0patch
- https://github.com/python/cpython/commit/08d8e18ad81cd45bc4a27d6da478b51ea49486e4patch
- https://github.com/python/cpython/commit/27648a1818749ef44c420afe6173af6868715437
- https://github.com/python/cpython/commit/41f468786762348960486c166833a218a0a436af
- https://github.com/python/cpython/commit/57937a8e5e293f0dcba5115f7b7a11b1e0c9a273
- https://github.com/python/cpython/commit/8d2d7bb2e754f8649a68ce4116271a4932f76907
- https://github.com/python/cpython/commit/9c9dda6625a2a90d2a06c657eee021d6be19842d
- https://github.com/python/cpython/commit/a46c10ec9d4050ab67b8a932e0859a2ea60c3cb8
- https://github.com/python/cpython/commit/a696ba8b4d42fd632afc9bc88ad830a2e4cceed8
- https://github.com/python/cpython/commit/c97e87593063d84a2bd9fe7068b30eb44de23dc0
- https://github.com/python/cpython/commit/ddcd2acd85d891a53e281c773b3093f9db953964patch
- https://github.com/python/cpython/commit/e91c11449cad34bac3ea55ee09ca557691d92b53
- https://github.com/python/cpython/issues/142145issue-tracking, patch
- https://github.com/python/cpython/pull/142146issue-tracking, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.