{"cve":{"cve_id":"CVE-2026-53724","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00281,"epss_percentile":0.19644,"epss_as_of":"2026-06-23","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.","published_at":"2026-06-12T18:34:38.237000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":2.1,"cvss_v4_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","cvss_v4_severity":"LOW","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-434","CWE-79"],"nvd_references":["https://github.com/parse-community/parse-server/security/advisories/GHSA-7wqv-xjf3-x35v","https://github.com/parse-community/parse-server/pull/10489","https://github.com/parse-community/parse-server/pull/10490"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:30:53.124161Z"},"effective_severity":"LOW","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"P","value_label":"Present"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"P","value_label":"Passive"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"N","value_label":"None"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"L","value_label":"Low"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"L","value_label":"Low"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"parse-community","vendor_name":"parse-community","product_slug":"parse-server","product_name":"parse-server","version_start":"< 8.6.79","version_start_inclusive":true,"version_end":"< 8.6.79","version_end_inclusive":true,"cpe23_uri":"cve5:parse-community:parse-server:< 8.6.79:< 8.6.79"},{"vendor_slug":"parse-community","vendor_name":"parse-community","product_slug":"parse-server","product_name":"parse-server","version_start":">= 9.0.0, < 9.9.1-alpha.4","version_start_inclusive":true,"version_end":">= 9.0.0, < 9.9.1-alpha.4","version_end_inclusive":true,"cpe23_uri":"cve5:parse-community:parse-server:>= 9.0.0, < 9.9.1-alpha.4:>= 9.0.0, < 9.9.1-alpha.4"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-7wqv-xjf3-x35v","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/parse-community/parse-server/pull/10489","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/parse-community/parse-server/pull/10490","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-12T18:34:38.237000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:55:28.590503Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:28.590503Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:28.590503Z","label":"CVSS score revised","source":"cvelistv5"}]}