CWE · MITRE source
CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
Last updated: 15 October 2026 20:36 UTC
Control responseHuman-reviewed
Answering this weakness across the control lifecycle, from our framework cross-walks.
PR.PS-06
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V15.3.6
NIST 800-53 r5 controls PROPOSED for this weakness (0)AI-assisted
These are model PROPOSALS, not graded mappings. They come
from controls_to_cwe_proposals, which carries no grade field at
all; across the CWE pages 1,540 of 1,722 such associations (89%) have never
been graded by anything. The heading said “address” until
2026-09-29, which asserted a relationship the data does not carry.
Graded cross-walks are on the framework map, not here.
| Control | Title | Family | Why it addresses this CWE |
|---|---|---|---|
| No NIST controls proposed yet. | |||
Top CVEs of this weakness type, ranked by Risk Priority
| CVE | Risk | CVSS | EPSS | Published |
|---|---|---|---|---|
CVE-2019-0230 UPD | 9.9 | 9.8 | 0.9695 | 2020-09-14 |
CVE-2022-24760 UPD | 9.4 | 10.0 | 0.4908 | 2022-03-12 |
CVE-2022-39396 UPD | 9.1 | 9.8 | 0.3872 | 2022-11-10 |
CVE-2022-2564 UPD | 8.9 | 9.8 | 0.3349 | 2022-07-28 |
CVE-2026-34621 KEV UPD | 8.7 | 8.6 | 0.0218 | 2026-04-11 |
CVE-2020-7774 UPD | 8.2 | 7.3 | 0.6938 | 2020-11-17 |
CVE-2019-14379 UPD | 8.1 | 9.8 | 0.0811 | 2019-07-29 |
CVE-2019-19919 UPD | 8.1 | 9.8 | 0.0707 | 2019-12-20 |
CVE-2022-1802 UPD | 8.0 | 8.8 | 0.2671 | 2022-12-22 |
CVE-2011-10019 UPD | 8.0 | 9.8 | 0.0580 | 2025-08-13 |
CVE-2020-28269 UPD | 7.9 | 9.8 | 0.0416 | 2020-11-12 |
CVE-2020-28270 UPD | 7.9 | 9.8 | 0.0385 | 2020-11-12 |
CVE-2021-25913 UPD | 7.9 | 9.8 | 0.0420 | 2021-02-08 |
CVE-2021-3918 UPD | 7.9 | 9.8 | 0.0383 | 2021-11-13 |
CVE-2021-44906 UPD | 7.9 | 9.8 | 0.0458 | 2022-03-17 |
CVE-2022-2200 UPD | 7.9 | 8.8 | 0.2394 | 2022-12-22 |
CVE-2020-12079 UPD | 7.8 | 10.0 | 0.0223 | 2020-04-23 |
CVE-2020-7706 UPD | 7.8 | 9.8 | 0.0280 | 2020-08-18 |
CVE-2020-7707 UPD | 7.8 | 9.8 | 0.0338 | 2020-08-18 |
CVE-2020-7708 UPD | 7.8 | 9.8 | 0.0282 | 2020-08-18 |
CVE-2020-7719 UPD | 7.8 | 9.8 | 0.0275 | 2020-09-01 |
CVE-2020-7720 UPD | 7.8 | 9.8 | 0.0319 | 2020-09-01 |
CVE-2020-28271 UPD | 7.8 | 9.8 | 0.0341 | 2020-11-12 |
CVE-2021-25912 UPD | 7.8 | 9.8 | 0.0334 | 2021-02-02 |
CVE-2021-25914 UPD | 7.8 | 9.8 | 0.0370 | 2021-03-01 |