{"id":"CVE-2026-121965","title":"Parse Server before 8.6.113 and 9.10.6-alpha.5 Prototype Pollution via Dot Notation Key","summary":"Parse Server before 8.6.113 and 9.0.0 before 9.10.6-alpha.5 contains a prototype pollution vulnerability when building objects for Cloud Code triggers and LiveQuery, where a dot notation key whose intermediate segment resolves through an…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-1321"],"vendor":"parse-community","product":"parse-server","affected":["parse-server >= 9.0.0 < 9.10.6-alpha.5","parse-server < 8.6.113"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-04T18:18:12.252207Z"},"published":"2026-11-04","updated":"2026-11-04","sourceUpdated":"2026-11-04T18:18:47.790Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121965","references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-95hp-82c6-25q5","label":"GitHub Security Advisory (GHSA-95hp-82c6-25q5)"},{"url":"https://github.com/parse-community/parse-server/pull/10810","label":"GitHub Pull Request #10810"},{"url":"https://github.com/parse-community/parse-server/pull/10811","label":"GitHub Pull Request #10811"},{"url":"https://www.vulncheck.com/advisories/parse-server-before-8.6.113-and-9.10.6-alpha.5-prototype-pollution-via-dot-notation-key","label":"VulnCheck Advisory: Parse Server before 8.6.113 and 9.10.6-alpha.5 Prototype Pollution via Dot Notation Key"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.483Z","epss":0.00413,"epssPercentile":0.35857,"slug":"CVE-2026-121965","body":"## Overview\n\nParse Server before 8.6.113 and 9.0.0 before 9.10.6-alpha.5 contains a prototype pollution vulnerability when building objects for Cloud Code triggers and LiveQuery, where a dot notation key whose intermediate segment resolves through an inherited member writes onto a process-wide built-in. Clients with write access to an object in a class with a trigger or LiveQuery can corrupt a built-in function, making unrelated requests fail until restart and denying service to all clients and hosted applications.\n\n## Affected\n\n- `parse-server >= 9.0.0 < 9.10.6-alpha.5`\n- `parse-server < 8.6.113`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}