{"id":"GHSA-vr5f-2r24-w5hc","summary":"Parse Server: File upload Content-Type override via extension mismatch","details":"### Impact\n\nA file can be uploaded with a filename extension that passes the file extension allowlist (e.g., `.txt`) but with a `Content-Type` header that differs from the extension (e.g., `text/html`). The `Content-Type` is passed to the storage adapter without consistency validation. Storage adapters that store and serve the provided Content-Type (such as S3 or GCS) serve the file with the mismatched Content-Type. The default GridFS adapter is not affected because it derives Content-Type from the filename at serving time.\n\n### Patches\n\nThe file upload now derives the Content-Type from the filename extension, overriding any user-provided Content-Type when the file has an extension.\n\n### Workarounds\n\nConfigure the storage adapter or CDN to derive Content-Type from the filename extension instead of using the stored Content-Type.","aliases":["BIT-parse-2026-35200","CVE-2026-35200"],"modified":"2026-04-08T15:41:00.130441486Z","published":"2026-04-04T04:22:11Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-04-04T04:22:11Z","nvd_published_at":"2026-04-06T20:16:27Z","cwe_ids":["CWE-436"],"severity":"LOW"},"references":[{"type":"WEB","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-vr5f-2r24-w5hc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35200"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10383"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10384"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"affected":[{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.0"},{"fixed":"9.7.1-alpha.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-vr5f-2r24-w5hc/GHSA-vr5f-2r24-w5hc.json"}},{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.73"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 8.6.72","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-vr5f-2r24-w5hc/GHSA-vr5f-2r24-w5hc.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"}]}