{"id":"CVE-2026-5758","aliases":["EUVD-2026-22993","GHSA-j452-xhg8-qg39"],"status":"published","title":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","description":"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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00534,"percentile":0.45397,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2026-04-15T17:20:13Z","modified":"2026-10-28T02:30:27Z","fixes":[{"ecosystem":"npm","package":"protocol-buffers-schema","fixed_in":["3.6.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"protocol-buffers-schema","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.1"}]}]},{"source":"osv","ecosystem":"npm","package":"protocol-buffers-schema","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.1"}]}]}],"products":[{"vendor":"mafintosh","product":"protocol-buffers-schema parser"}],"references":[{"url":"https://github.com/mafintosh/protocol-buffers-schema/pull/70","tags":["fix","web"]},{"url":"https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution/","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5758","tags":["advisory"]},{"url":"https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution","tags":["web"]},{"url":"https://github.com/advisories/GHSA-j452-xhg8-qg39"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5758.json","tags":["advisory"]},{"url":"https://github.com/mafintosh/protocol-buffers-schema","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-5758","title":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","description":"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.","status":"published","published":"2026-04-15T17:20:13.551Z","modified":"2026-04-15T18:55:45.526Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"adp"}],"updated_at":"2026-11-02T13:39:27.849196Z"}],"euvd":[{"id":"EUVD-2026-22993","description":"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.","status":"published","published":"2026-04-15T17:20:13Z","modified":"2026-04-15T18:55:45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T19:24:24.796113Z"}],"ghsa":[{"id":"GHSA-j452-xhg8-qg39","title":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","description":"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.","status":"published","published":"2026-04-15T18:31:58Z","modified":"2026-04-16T21:33:55Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:39:55.105822Z"}],"nvd":[{"id":"CVE-2026-5758","description":"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.","status":"published","published":"2026-04-15T18:17:24.92Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"}],"updated_at":"2026-11-02T14:12:14.748836Z"}],"osv":[{"id":"CVE-2026-5758","title":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","description":"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.","status":"published","published":"2026-04-15T17:20:13.551Z","modified":"2026-10-28T02:30:27.348342603Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:12.016252Z"},{"id":"GHSA-j452-xhg8-qg39","title":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","description":"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.","status":"published","published":"2026-04-15T18:31:58Z","modified":"2026-09-10T03:51:02.158228495Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:49.977351Z"}]}}