{"id":"CVE-2026-5758","state":"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.","publishedAt":"2026-04-15T17:20:13.551Z","updatedAt":"2026-04-15T18:55:45.526Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","source":"CISA-ADP"},"assigner":"certcc","products":["Mafintosh Protocol-buffers-schema parser"],"affected":[{"vendor":"Mafintosh","product":"Protocol-buffers-schema parser","versions":[{"version":"3.6.0","status":"affected","lessThan":"3.6.1","versionType":"custom"}]}],"references":["https://github.com/mafintosh/protocol-buffers-schema/pull/70","https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution/"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/5xxx/CVE-2026-5758.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-5758","state":"PUBLISHED","datePublished":"2026-04-15T17:20:13.551Z","dateUpdated":"2026-04-15T18:55:45.526Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2026-04-07T17:20:03.756Z"},"containers":{"cna":{"title":"Mafintosh's protocol-buffers-schema is vulnerable to prototype pollution","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Mafintosh","product":"Protocol-buffers-schema parser","versions":[{"version":"3.6.0","status":"affected","lessThan":"3.6.1","versionType":"custom"}]}],"references":[{"url":"https://github.com/mafintosh/protocol-buffers-schema/pull/70"},{"url":"https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution/"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}],"providerMetadata":{"shortName":"certcc","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateUpdated":"2026-04-15T17:23:02.336Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"VINCE 3.0.35","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-5758"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-15T18:55:12.559324Z","id":"CVE-2026-5758","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":"2026-04-15T18:55:45.526Z"}}]}}}