{"cve":{"cve_id":"CVE-2026-47138","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":0.00584,"epss_percentile":0.43317,"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 8.6.77 and 9.9.1-alpha.1, an unauthenticated attacker who knows a publicly-known Parse Application ID can submit a single HTTP request whose client SDK version field contains adversarial input that triggers polynomial backtracking in a request-header parser. The parsing runs before session authentication and before rate limiting on every /parse/* request, so the request consumes seconds to minutes of synchronous CPU on a Node.js worker before any access control evaluates it. A small number of concurrent requests can saturate a worker; a single large request via the body-field variant can pin a worker for minutes. Production deployments running the default configuration are affected. This issue has been patched in versions 8.6.77 and 9.9.1-alpha.1.","published_at":"2026-06-12T18:22:02.751000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":8.7,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvss_v4_severity":"HIGH","ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-1333"],"nvd_references":["https://github.com/parse-community/parse-server/security/advisories/GHSA-38m6-82c8-4xfm","https://github.com/parse-community/parse-server/pull/10463","https://github.com/parse-community/parse-server/pull/10464"],"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":"2026-06-28T23:30:40.194898Z"},"effective_severity":"HIGH","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":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"H","value_label":"High"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"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":"< 8.6.77","version_start_inclusive":true,"version_end":"< 8.6.77","version_end_inclusive":true,"cpe23_uri":"cve5:parse-community:parse-server:< 8.6.77:< 8.6.77"},{"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.1","version_start_inclusive":true,"version_end":">= 9.0.0, < 9.9.1-alpha.1","version_end_inclusive":true,"cpe23_uri":"cve5:parse-community:parse-server:>= 9.0.0, < 9.9.1-alpha.1:>= 9.0.0, < 9.9.1-alpha.1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-38m6-82c8-4xfm","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/parse-community/parse-server/pull/10463","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/parse-community/parse-server/pull/10464","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-12T18:22:02.751000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:54:57.553414Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:54:57.553414Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:54:57.553414Z","label":"CVSS score revised","source":"cvelistv5"}]}