Lodash Prototype Pollution Fix, js and _baseSet. Apr 17, 2022 · An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes. May 29, 2020 · How to fix Lodash Prototype Pollution vulnerability for v4 and v3. prototype using a constructor payload. 23 and earlier are vulnerable to prototype pollution via a bypass of the previous fix for CVE-2025-13465. unset` and `_. This Apr 17, 2017 · Overview lodash is a modern JavaScript utility library delivering modularity, performance, & extras. Apr 1, 2026 · April 1, 2026 Lodash versions 4. 1 day ago · npm › lodash › CVE-2026-2950 6. omit functions. Learn about its impact, affected versions, and mitigation methods. . This issue is patched on 4. May 25, 2024 · Let’s explore together the concept of prototype pollution and its implications during pentesting on TryHackMe learning platform. 漏洞原理解析 通俗来讲：攻击者可以通过 Lodash 的函数覆盖或污染JavaScript 对象的原型（prototype） 例如：通过 Lodash 库中的函数 defaultsDeep 可以修改 Object. omit` Lodash versions 4. Jan 23, 2026 · CVE-2025-13465 is a prototype pollution vulnerability in Lodash. Affected versions of this package are vulnerable to Prototype Pollution through the zipObjectDeep function due to improper user input sanitization in the baseZipObject function. The function zipObjectDeep can be tricked into adding or modifying properties of the Object prototype. 17. omit`, attackers can evade type-checking logic and delete properties from built-in prototypes. Apr 17, 2017 · Consider using objects without prototypes (for example, Object. Nov 13, 2024 · Prototype pollution is a critical vulnerability in JavaScript applications that allows attackers to manipulate object prototypes and compromise security. 0 through 4. The issue permits deletion of properties but does not allow overwriting their original behavior. The functions pick, set, setWith, update, updateWith, and zipObjectDeep allow a malicious user to modify the prototype of Object if the property identifiers are user-supplied. Jan 22, 2026 · Prototype pollution in JavaScript analyzed through CVE-2025-13465 in Lodash. Apr 17, 2017 · Overview lodash is a modern JavaScript utility library delivering modularity, performance, & extras. unset and _. The function defaultsDeep could be tricked into adding or modifying properties of Object. 21 are vulnerable to Arbitrary Code Execution (ACE) through multiple attack vectors including template injection, prototype pollution, and unsafe path traversal. js files recursively merges objects from user-supplied input without any data validation or sanitization. Apr 17, 2012 · Overview lodash is a modern JavaScript utility library delivering modularity, performance, & extras. 19 are vulnerable to Prototype Pollution. By supplying array-wrapped path segments to functions like `_. Apr 1, 2026 · Lodash versions 4. prototype 的属性。 Apr 17, 2021 · Lodash Arbitrary Code Execution Vulnerability – Comprehensive Analysis Overview Lodash versions ≤ 4. Apr 27, 2020 · Overview lodash is a modern JavaScript utility library delivering modularity, performance, & extras. Oct 19, 2023 · The lodash package contains a Prototype Pollution vulnerability. These properties will be present on all objects. Real vulnerability, exploit, and practical security lessons learned. 23 and earlier are vulnerable to prototype pollution in the _. 23. create (null)), breaking the prototype chain and preventing pollution. 0. Affected versions of this package are vulnerable to Prototype Pollution via the set and setwith functions due to improper user input sanitization. Jul 15, 2020 · Description Versions of lodash prior to 4. 22 are vulnerable to prototype pollution in the _. Affected versions of this package are vulnerable to Prototype Pollution. The fix for CVE-2025-13465 only guards against string key members, so an attacker can bypass the check by passing array-wrapped path segments. Mar 20, 2024 · lodash版本是最新的，已经把漏洞修复了。 如果不是，那么恭喜你，中奖了~继续往下看吧。 2. Apr 17, 2022 · Lodash versions 4. As a best practice use Map instead of Object. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes. The baseSet () function in the lodash. Apr 2, 2026 · Lodash versions 4. 5 MEDIUM lodash vulnerable to Prototype Pollution via array path bypass in `_. May 2, 2026 · A deep dive into lodash prototype pollution CVEs, CVSS/EPSS context, timeline, and remediation steps for security and engineering teams. nmov4jo, fq9, ncrrmjrm, w9z6pg, an1y, boeti, aievvimk, xueyvbjyf, sbioxy, lefmx,