{"id":"CVE-2026-119569","title":"Parse Server 9.0.0 before 9.10.5-alpha.9 Prototype Pollution Denial of Service","summary":"Parse Server before 8.6.108 and 9.0.0 before 9.10.5-alpha.9 contains a prototype pollution vulnerability because user-controlled keys are expanded into objects without own-property checks. Clients with class write access can send dot not…","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 < 9.10.5-alpha.9","parse-server < 8.6.108"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-30T15:21:11.278620Z"},"published":"2026-10-30","updated":"2026-10-30","sourceUpdated":"2026-10-30T15:53:54.963Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-119569","references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-rx55-fw4j-pvpx","label":"GitHub Security Advisory (GHSA-rx55-fw4j-pvpx)"},{"url":"https://www.vulncheck.com/advisories/parse-server-9.0.0-before-9.10.5-alpha.9-prototype-pollution-denial-of-service","label":"VulnCheck Advisory: Parse Server 9.0.0 before 9.10.5-alpha.9 Prototype Pollution Denial of Service"}],"tags":["cve.org"],"epss":0.00378,"epssPercentile":0.3195,"ingestedAt":"2026-11-05T16:07:30.519Z","slug":"CVE-2026-119569","body":"## Overview\n\nParse Server before 8.6.108 and 9.0.0 before 9.10.5-alpha.9 contains a prototype pollution vulnerability because user-controlled keys are expanded into objects without own-property checks. Clients with class write access can send dot notation field keys or ACL entry names matching built-in object members to corrupt built-in functions, causing all requests to fail until server restart.\n\n## Affected\n\n- `parse-server >= 9.0.0 < 9.10.5-alpha.9`\n- `parse-server < 8.6.108`\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":[]}