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: 21 August 2026 00:24 UTC
Cumulative inbound coverage
How completely the frameworks we cross-walk collectively cover this — the verdict is the strongest single mapping (overlapping partials are not summed); breadth shows the corroboration behind it.
Collective: partial · 1 mapping(s) from 1 framework(s): CAPEC 1 (partial)
Control responseHuman-reviewed
Answering this weakness across the control lifecycle, from our framework cross-walks.
Prevent
Stop it (NIST 800-53 / CSF Protect)
PR.PS-06
Detect
Catch it (CSF Detect / Respond)
—
Harden
Shrink the surface (DISA STIG)
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Validate
Prove the fix (OWASP ASVS)
V15.3.6
NIST 800-53 r5 controls that address this weakness (0)AI-assisted
| 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 | 0.9711 | 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 | 0.3268 | 2022-07-28 |
CVE-2026-34621 KEV | 8.7 | 8.6 | 0.0709 | 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-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-2021-44906 UPD | 7.9 | 9.8 | 0.0458 | 2022-03-17 |
CVE-2022-2200 UPD | 7.9 | 8.8 | 0.2394 | 2022-12-22 |
CVE-2011-10019 UPD | 7.9 | 9.8 | 0.0401 | 2025-08-13 |
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 |
CVE-2021-25915 UPD | 7.8 | 9.8 | 0.0351 | 2021-03-09 |