{"id":"CVE-2021-29491","aliases":["GHSA-79jw-6wg7-r9g4","GHSA-r5cq-9537-9rpf"],"url":"https://o3.security/vulnerability/CVE-2021-29491","summary":"Use of Potentially Dangerous Function in mixme","details":"In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions. The polluted attribute will be directly assigned to every object in the program. This will put the availability of the program at risk causing a potential denial of service (DoS).","published":"2021-05-03T12:15:07.467Z","modified":"2026-07-15T10:35:52.117736Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"mixme","fixedVersion":"0.5.1"}],"fix":{"url":"https://github.com/adaltas/node-mixme/commit/cfd5fbfc32368bcf7e06d1c5985ea60e34cd4028","label":"adaltas/node-mixme@cfd5fbf"},"references":[{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210618-0005/"},{"type":"ADVISORY","url":"https://www.npmjs.com/~david"},{"type":"REPORT","url":"https://github.com/adaltas/node-mixme/issues/1"},{"type":"FIX","url":"https://github.com/adaltas/node-mixme/commit/cfd5fbfc32368bcf7e06d1c5985ea60e34cd4028"},{"type":"FIX","url":"https://github.com/adaltas/node-mixme/security/advisories/GHSA-79jw-6wg7-r9g4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T10:35:52.117736Z"}}