CWE-1321— Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)
478 active CVEs classified under this weakness category. Sourced from NVD, GHSA, and vendor advisories. Full definition on MITRE →
CVEs classified under CWE-1321page 10 of 10
- CVE-2026-34621HIGHCVSS 8.6EG 9.6⚠ KEV2026-04-11
Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code execution in the …
- CVE-2026-34622HIGHCVSS 8.6EG 8.62026-04-14
Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code exe…
- CVE-2026-34626MEDIUMCVSS 6.3EG 6.32026-04-14
Acrobat Reader versions 26.001.21411, 24.001.30360, 24.001.30362 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary file sys…
- CVE-2026-35209HIGHCVSS 7.5EG 7.52026-04-06
defu is software that allows uers to assign default properties recursively. Prior to version 6.1.5, applications that pass unsanitized user input (e.g. parsed JSON request bodies, database records, or config files from untrusted sources) a…
- CVE-2026-40190MEDIUMCVSS 5.6EG 5.62026-04-10
LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the LangSmith JavaScript/TypeScript SDK (langsmith) contains an incomplete prototype pollution fix in its internally vendored lodash set() ut…
- CVE-2026-41238MEDIUMCVSS 6.9EG 6.92026-04-23
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses `DOMPurify.sanitize()` with the default confi…
- CVE-2026-41690HIGHCVSS 8.6EG 8.62026-05-08
18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Versions prior to 3.9.3 allow an unauthenticated HTTP client to pollute Object.prototype in the Node.js process hostin…
- CVE-2026-42033HIGHCVSS 7.4EG 7.42026-04-24
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, when Object.prototype has been polluted by any co-dependency with keys that axios reads without a hasOwnProperty guard, an attacker can (a) silen…
- CVE-2026-42035HIGHCVSS 7.4EG 7.42026-04-24
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers int…
- CVE-2026-42041MEDIUMCVSS 4.8EG 4.82026-04-24
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the Axios library is vulnerable to a Prototype Pollution "Gadget" attack that allows any Object.prototype pollution to silently suppress all HTTP…
- CVE-2026-42044MEDIUMCVSS 6.5EG 6.52026-04-24
Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.2, he Axios library is vulnerable to a Prototype Pollution "Gadget" attack that allows any Object.prototype pollution in the application's dependen…
- CVE-2026-42077MEDIUMCVSS 5.2EG 5.22026-05-04
Evolver is a GEP-powered self-evolving engine for AI agents. Prior to version 1.69.3, a prototype pollution vulnerability in the mailbox store module allows attackers to modify the behavior of all JavaScript objects by injecting malicious …
- CVE-2026-42231HIGHCVSS 8.8EG 8.82026-05-04
n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, a flaw in the xml2js library used to parse XML request bodies in n8n's webhook handler allowed prototype pollution via a crafted XML payloa…
- CVE-2026-42232HIGHCVSS 8.8EG 8.82026-05-04
n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an authenticated user with permission to create or modify workflows could achieve global prototype pollution via the XML Node leading to RC…
- CVE-2026-42264HIGHCVSS 7.4EG 7.42026-05-08
Axios is a promise based HTTP client for the browser and Node.js. From version 1.0.0 to before version 1.15.2, fFive config properties (auth, baseURL, socketPath, beforeRedirect, and insecureHTTPParser) in the HTTP adapter are read via dir…
- CVE-2026-44005CRITICALCVSS 10.0EG 10.02026-05-13
vm2 is an open source vm/sandbox for Node.js. From 3.9.6 to 3.10.5, vm2's bridge exposes mutable proxies for real host-realm intrinsic prototypes and then forwards sandbox writes into the underlying host objects with otherReflectSet() and …
- CVE-2026-44290HIGHCVSS 7.5EG 7.52026-05-13
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs allowed certain schema option paths to traverse through inherited object properties while applying options. A crafted protobuf sc…
- CVE-2026-44292MEDIUMCVSS 5.3EG 5.32026-05-13
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated message constructors copied enumerable properties from a provided properties object without filtering the __proto__ key…
- CVE-2026-44483HIGHCVSS 8.2EG 8.22026-05-27
RVF (formerly Remix Validated Form) provides easy form validation and state management for React. From 6.0.0 to before 6.0.4 and 7.0.2, setPath in @rvf/set-get (used by @rvf/core to flatten incoming form data into a nested object) does not…
- CVE-2026-44966HIGHCVSS 8.3EG 8.32026-05-26
Velocity.js is a JavaScript implementation of the Apache Velocity template engine. In 2.1.5 and earlier, a prototype pollution vulnerability was discovered in velocityjs. This issue occurs during the processing of #set directives in Veloci…
- CVE-2026-45302HIGHCVSS 8.2EG 8.22026-05-18
parse-nested-form-data is a tiny node module for parsing FormData by name into objects and arrays. Prior to version 1.0.1, parseFormData() walks bracket and dot-notation FormData field names into nested objects without filtering reserved p…
- CVE-2026-46509HIGHCVSS 8.2EG 8.22026-05-28
deepobj provides get, set, delete deep objects in javascript. Prior to 1.0.3, prototype pollution is possible when property paths contain __proto__/constructor/prototype. The property path must not be exposed as user input. This vulnerabil…
- CVE-2026-46510HIGHCVSS 8.2EG 8.22026-05-18
form-data-objectizer converts FormData to object. Prior to 1.0.1, form-data-objectizer walks bracket-notation form keys (e.g. name[sub]) into nested objects without filtering __proto__, constructor, or prototype. A single HTTP form field w…
- CVE-2026-6594HIGHCVSS 7.3EG 7.32026-04-20
A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototyp…
- CVE-2026-6621HIGHCVSS 7.3EG 7.32026-04-20
A vulnerability was determined in 1024bit extend-deep up to 0.1.6. The impacted element is an unknown function of the file index.js. This manipulation of the argument __proto__ causes improperly controlled modification of object prototype …
- CVE-2026-8161HIGHCVSS 7.5EG 7.52026-05-12
multiparty@4.2.3 and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as __proto__, constru…
- CVE-2026-8657HIGHCVSS 8.2EG 8.22026-05-16
Versions of the package jsondiffpatch before 0.7.6 are vulnerable to Prototype Pollution via the jsondiffpatch.patch() and jsondiffpatch/formatters/jsonpatch.patch() APIs. An attacker can perform prototype pollution by supplying crafted de…
- CVE-2026-9101MEDIUMCVSS 4.3EG 4.32026-05-20
Prototype pollution in csv parsing logic during import can lead to untrusted file paths (but not arguments) entering shell.openExternal after specific user behavior leading to "1-click" command execution.
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