{"id":"CVE-2026-73647","state":"PUBLISHED","title":"Quasar Framework: Prototype pollution in Quasar extend() utility","description":"Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, target, source) deep merges without rejecting an own __proto__ property. The merge could descend into the prototype object and write attacker-controlled properties to Object.prototype in the same JavaScript process. Applications that passed user-controlled or partially user-controlled objects to extend() could experience logic bypass, unsafe default-option injection, denial of service, or other application-specific impact when polluted properties were later consumed. This issue is fixed in version 2.22.0.","publishedAt":"2026-08-13T17:57:09.014Z","updatedAt":"2026-08-13T18:41:21.421Z","severity":{"score":5.6,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["quasarframework quasar"],"affected":[{"vendor":"quasarframework","product":"quasar","versions":[{"version":"< 2.22.0","status":"affected"}]}],"references":["https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j","https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7","https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0"],"weaknesses":["CWE-1321"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73647.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73647","state":"PUBLISHED","datePublished":"2026-08-13T17:57:09.014Z","dateUpdated":"2026-08-13T18:41:21.421Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-13T14:04:09.604Z"},"containers":{"cna":{"title":"Quasar Framework: Prototype pollution in Quasar extend() utility","descriptions":[{"lang":"en","value":"Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, target, source) deep merges without rejecting an own __proto__ property. The merge could descend into the prototype object and write attacker-controlled properties to Object.prototype in the same JavaScript process. Applications that passed user-controlled or partially user-controlled objects to extend() could experience logic bypass, unsafe default-option injection, denial of service, or other application-specific impact when polluted properties were later consumed. This issue is fixed in version 2.22.0."}],"affected":[{"vendor":"quasarframework","product":"quasar","versions":[{"version":"< 2.22.0","status":"affected"}]}],"references":[{"url":"https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j","name":"https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7","name":"https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7","tags":["x_refsource_MISC"]},{"url":"https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0","name":"https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.6,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-13T17:57:09.014Z"},"source":{"advisory":"GHSA-3r53-75j5-3g7j","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T18:41:13.711876Z","id":"CVE-2026-73647","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-13T18:41:21.421Z"}}]}}}