{"id":"CVE-2026-5758","aliases":["GHSA-j452-xhg8-qg39"],"url":"https://o3.security/vulnerability/CVE-2026-5758","summary":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","details":"JavaScript is vulnerable to prototype pollution in Mafintosh's protocol-buffers-schema Version 3.6.0, where an attacker may alter the application logic, bypass security checks, cause a DoS or achieve remote code execution.","published":"2026-04-15T17:20:13.551Z","modified":"2026-08-07T11:30:59.942893179Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"protocol-buffers-schema","fixedVersion":"3.6.1"}],"fix":{"url":"https://github.com/mafintosh/protocol-buffers-schema/pull/70","label":"mafintosh/protocol-buffers-schema#70"},"references":[{"type":"WEB","url":"https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5758.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5758"},{"type":"FIX","url":"https://github.com/mafintosh/protocol-buffers-schema/pull/70"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:30:59.942893179Z"}}