{"id":"EUVD-2026-45337","enisaUuid":"52d538a5-ff9e-335c-946b-300e79b07013","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[\u0027__proto__\u0027] 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.","datePublished":"Jul 17, 2026, 8:56:51 PM","dateUpdated":"Jul 20, 2026, 5:38:02 PM","baseScore":3.7,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","references":"https://github.com/feathersjs/feathers/security/advisories/GHSA-28xv-ph75-77wh\nhttps://github.com/feathersjs/feathers/pull/3690\nhttps://github.com/feathersjs/feathers/commit/28b3c03c63bdbff53115fdaa46c56980e7942acc\nhttps://github.com/feathersjs/feathers/releases/tag/v5.0.45\n","aliases":"CVE-2026-54335\nGHSA-28xv-ph75-77wh\n","assigner":"GitHub_M","epss":0.39,"enisaIdProduct":[{"id":"b434eab9-4c85-3b03-8399-de6282d36478","product":{"name":"feathers","vendor":{"name":"feathersjs"}},"product_version":"\u003c 5.0.45"}],"enisaIdVendor":[{"id":"3a70770f-804c-3e37-8c65-60addbac8621","vendor":{"name":"feathersjs"}}],"enisaIdVulnerability":[{"id":"5e00351b-3b90-3c6a-ac53-23269574e476","vulnerability":{"id":"CVE-2026-54335","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[\u0027__proto__\u0027] 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.","datePublished":"Jul 17, 2026, 8:56:51 PM","dateUpdated":"Jul 20, 2026, 5:38:02 PM","status":"PUBLISHED","baseScore":3.7,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","references":"https://github.com/feathersjs/feathers/security/advisories/GHSA-28xv-ph75-77wh\nhttps://github.com/feathersjs/feathers/pull/3690\nhttps://github.com/feathersjs/feathers/commit/28b3c03c63bdbff53115fdaa46c56980e7942acc\nhttps://github.com/feathersjs/feathers/releases/tag/v5.0.45\n","enisa_id":"EUVD-2026-45337\n","assigner":"GitHub_M","epss":0.39,"dataProcessed":"Oct 28, 2026, 7:16:10 AM","vulnerabilityProduct":[{"id":"bd550006-e001-32db-ade1-3de0e9297a33","product":{"name":"feathers","vendor":{"name":"feathersjs"}},"product_version":"\u003c 5.0.45"}],"vulnerabilityVendor":[{"id":"377c9b4a-8b10-3158-8f3f-fdb62f0e0e7f","vendor":{"name":"feathersjs"}}]}},{"id":"e22d180d-fe4f-31eb-93b4-530b5509bd63","vulnerability":{"id":"GHSA-28xv-ph75-77wh","description":"Prototype pollution in @feathersjs/commons _.merge via JSON-parsed __proto__","datePublished":"Jul 14, 2026, 7:40:05 PM","dateUpdated":"Jul 14, 2026, 7:40:05 PM","baseScore":0.0,"references":"https://github.com/feathersjs/feathers/security/advisories/GHSA-28xv-ph75-77wh\nhttps://github.com/feathersjs/feathers/pull/3690\nhttps://github.com/feathersjs/feathers/commit/28b3c03c63bdbff53115fdaa46c56980e7942acc\nhttps://github.com/feathersjs/feathers\nhttps://github.com/feathersjs/feathers/releases/tag/v5.0.45\n","enisa_id":"EUVD-2026-45337\n","aliases":"CVE-2026-54335\nGHSA-28xv-ph75-77wh\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:57:47 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}