CVE-2025-12084
MEDIUMCVSS 5.3/10EPSS 0.70%
Last modified
CVE-2025-12084 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Python | Python | < 3.13.11 | — |
| Python | Python | >= 3.14.0, < 3.14.2 | — |
| Python | Python | 3.15.0 | Alpha1 |
References
- https://github.com/python/cpython/issues/142145Issue Tracking, Patch
- https://github.com/python/cpython/pull/142146Issue Tracking, Patch
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2025-12084?
CVE-2025-12084 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.
How do I fix CVE-2025-12084?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2025-12084?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST