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CWE-1321

624 CVEs • Abstraction: Variant

Improperly 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.

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CVEs (624)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Asciitable.js Project
1Asciitable.js
Jun 17, 2026
Jan 4, 2021
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
The package asciitable.js before 1.0.3 are vulnerable to Prototype Pollution via the main function.
1Multi Ini Project
1Multi Ini
Jun 17, 2026
Dec 22, 2020
N/A· v4
8.1 HIGH· v3
7.5 HIGH· v2
This affects the package multi-ini before 2.1.2. It is possible to pollute an object's prototype by specifying the constructor.proto object as part of an array. This is a bypass of CVE-2020-28448.
1Multi Ini Project
1Multi Ini
Jun 17, 2026
Dec 22, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
This affects the package multi-ini before 2.1.1. It is possible to pollute an object's prototype by specifying the proto object as part of an array.
1Datatables
1Datatables.net
Jun 17, 2026
Dec 16, 2020
N/A· v4
7.3 HIGH· v3
7.5 HIGH· v2
All versions of package datatables.net are vulnerable to Prototype Pollution due to an incomplete fix for https://snyk.io/vuln/SNYK-JS-DATATABLESNET-598806.
1Moutjs
1Mout
Jun 17, 2026
Dec 11, 2020
N/A· v4
7.5 HIGH· v3
7.5 HIGH· v2
This affects all versions of package mout. The deepFillIn function can be used to 'fill missing properties recursively', while the deepMixIn 'mixes objects into the target object, recursively mixing existing child object...Show more
This affects all versions of package mout. The deepFillIn function can be used to 'fill missing properties recursively', while the deepMixIn 'mixes objects into the target object, recursively mixing existing child objects as well'. In both cases, the key used to access the target object recursively is not checked, leading to a Prototype Pollution.Show less
2Debian
Ini Project
2Debian Linux
Ini
Oct 8, 2026
Dec 11, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
This affects the package ini before 1.3.6. If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further de...Show more
This affects the package ini before 1.3.6. If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further depending on the context.Show less
3Oracle
SiemensY18n Project
3Graalvm
Sinec Infrastructure Network ServicesY18n
Jun 17, 2026
Nov 17, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerable to Prototype Pollution.
1Controlled Merge Project
1Controlled Merge
Jun 17, 2026
Nov 15, 2020
N/A· v4
7.5 HIGH· v3
5.0 MEDIUM· v2
Prototype pollution vulnerability in 'controlled-merge' versions 1.0.0 through 1.2.0 allows attacker to cause a denial of service and may lead to remote code execution.
2Deephas Project
Sharpred
2Deephas
Deephas
Jun 17, 2026
Nov 12, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
Prototype pollution vulnerability in 'deephas' versions 1.0.0 through 1.0.5 allows attacker to cause a denial of service and may lead to remote code execution.
1Mjpclab
1Object Hierarchy Access
Jun 17, 2026
Nov 12, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
1Exodus
1Field
Jun 17, 2026
Nov 12, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
Prototype pollution vulnerability in 'field' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.
1Json8 Project
1Json8
Jun 17, 2026
Nov 12, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.
1Grpc
1Grpc
Jun 17, 2026
Nov 11, 2020
N/A· v4
9.8 CRITICAL· v3
5.0 MEDIUM· v2
The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.
1Json Ptr Project
1Json Ptr
Jun 17, 2026
Nov 10, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
This affects all versions of package json-ptr. The issue occurs in the set operation (https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.htmlset) when the force flag is set to true. The function recursi...Show more
This affects all versions of package json-ptr. The issue occurs in the set operation (https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.htmlset) when the force flag is set to true. The function recursively set the property in the target object, however it does not properly check the key being set, leading to a prototype pollution.Show less
1Chartjs
1Chart.js
Jun 17, 2026
Oct 29, 2020
N/A· v4
9.8 CRITICAL· v3
5.0 MEDIUM· v2
This affects the package chart.js before 2.9.4. The options parameter is not properly sanitized when it is processed. When the options are processed, the existing options (or the defaults options) are deeply merged with...Show more
This affects the package chart.js before 2.9.4. The options parameter is not properly sanitized when it is processed. When the options are processed, the existing options (or the defaults options) are deeply merged with provided options. However, during this operation, the keys of the object being set are not checked, leading to a prototype pollution.Show less
1Chaijis
1Pathval
Jun 17, 2026
Oct 26, 2020
N/A· v4
7.2 HIGH· v3
6.5 MEDIUM· v2
pathval before version 1.1.1 is vulnerable to prototype pollution.
1Ts.ed Project
1Ts.ed
Jun 17, 2026
Oct 20, 2020
N/A· v4
8.1 HIGH· v3
6.8 MEDIUM· v2
This affects the package @tsed/core before 5.65.7. This vulnerability relates to the deepExtend function which is used as part of the utils directory. Depending on if user input is provided, an attacker can overwrite and...Show more
This affects the package @tsed/core before 5.65.7. This vulnerability relates to the deepExtend function which is used as part of the utils directory. Depending on if user input is provided, an attacker can overwrite and pollute the object prototype of a program.Show less
1Mathjs
1Math.js
Jun 17, 2026
Oct 13, 2020
N/A· v4
7.3 HIGH· v3
7.5 HIGH· v2
The package mathjs before 7.5.1 are vulnerable to Prototype Pollution via the deepExtend function that runs upon configuration updates.
1Manuelstofer
1Json Pointer
Jun 17, 2026
Oct 5, 2020
N/A· v4
7.2 HIGH· v3
6.5 MEDIUM· v2
This affects the package json-pointer before 0.6.1. Multiple reference of object using slash is supported.
1Safetydance Project
1Safetydance
Jun 17, 2026
Oct 2, 2020
N/A· v4
9.8 CRITICAL· v3
7.5 HIGH· v2
All versions of package safetydance are vulnerable to Prototype Pollution via the set function.