{"id":"CVE-2026-53724","revision":"8db7cca9746e4f73bb8bd4255e07aca7","records":[{"revision":"8db7cca9746e4f73bb8bd4255e07aca7","observedAt":"2026-10-25T13:17:16.273+00:00","statement":{"source":"nvd","id":"CVE-2026-53724","aliases":[],"title":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1-alpha.4, the default file upload extension blocklist can be bypassed by appending a trailing dot to a…","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1-alpha.4, the default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked (e.g. poc.svg.). The trailing dot causes the extension parser to extract an empty string, which short-circuits the blocklist check, and the attacker-controlled Content-Type is forwarded to the storage adapter unchanged. Storage adapters that persist and serve the provided Content-Type (such as S3 or GCS) then serve the file with an active type such as image/svg+xml, enabling stored XSS when a victim opens the file URL. The default GridFS adapter is not affected because it sets X-Content-Type-Options: nosniff on responses. This issue has been patched in versions 8.6.79 and 9.9.1-alpha.4.","state":0,"publishedAt":"2026-06-12T19:16:30.22+00:00","modifiedAt":"2026-06-17T10:58:00.41+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":2.1,"severity":"LOW"}],"references":["https://github.com/parse-community/parse-server/pull/10489","https://github.com/parse-community/parse-server/pull/10490","https://github.com/parse-community/parse-server/security/advisories/GHSA-7wqv-xjf3-x35v"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53724","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-79","CWE-434"],"productCriteria":[],"sourceDates":{"published":"2026-06-12T19:16:30.220","lastModified":"2026-06-17T10:58:00.410"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-53724","identifiers":["CVE-2026-53724"]},"retained":false,"historicalAffected":[]}],"coverage":[]}