{"id":82175,"date":"2026-07-18T01:47:44","date_gmt":"2026-07-17T22:17:44","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-54335-feathersjs-prototype-pollution-in-feathersjs-commons-_-merge-via-json-parsed-__proto__\/"},"modified":"2026-07-18T01:47:44","modified_gmt":"2026-07-17T22:17:44","slug":"cve-2026-54335-feathersjs-prototype-pollution-in-feathersjs-commons-_-merge-via-json-parsed-__proto__","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-54335-feathersjs-prototype-pollution-in-feathersjs-commons-_-merge-via-json-parsed-__proto__\/","title":{"rendered":"CVE-2026-54335 &#8211; Feathersjs: Prototype pollution in @feathersjs\/commons _.merge via JSON-parsed __proto__"},"content":{"rendered":"<p>CVE ID :CVE-2026-54335<\/p>\n<p>  Published : July 17, 2026, 10:17 p.m. | 1\u00a0hour, 20\u00a0minutes ago<\/p>\n<p>  Description :Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In 5.0.44 and earlier, the _.merge(target, source) utility exported by @feathersjs\/commons recursively merges source into target by iterating Object.keys(source). When source was produced by JSON.parse and contains a __proto__, constructor, or prototype key, that key is returned as an own-enumerable property; the recursive merge then resolves target[&#8216;__proto__&#8217;] to Object.prototype and writes attacker-supplied properties onto it, polluting the prototype for all plain objects in the process for the lifetime of the Node process. This issue is fixed in version 5.0.45.<\/p>\n<p>  Severity: 3.7 | LOW<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-54335 Published : July 17, 2026, 10:17 p.m. | 1\u00a0hour, 20\u00a0minutes ago Description :Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In 5.0.44 and earlier, the _.merge(target, source) utility exported by @feathersjs\/commons recursively merges source into target by iterating Object.keys(source). When source was produced by JSON.parse &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82175","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82175","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82175"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82175\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82175"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82175"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82175"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}