{"id":"CVE-2026-116801","kind":"vulnerability","aliases":["CVE-2026-116801"],"related":[],"title":"Parse Server: relation queries skip owner ACL check, leaking linked object IDs","description":"Parse Server before 8.6.105 and 9.0.0 before 9.10.5-alpha.6 does not validate the owning object reference in $relatedTo relation queries, so supplying a query operator instead of an object ID bypasses the owning-object ACL check. A client with read access to at least one object of the owning class can disclose which readable objects are linked to owning objects it cannot read.","summary":"Parse Server does not validate the owning object ID in $relatedTo relation queries, so passing a query operator in place of an ID bypasses the owner's ACL check. A client with read access to one object of the owning class can learn which readable objects link to owners it cannot read.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["backend-as-a-service","node.js","package","parse-server","self-hosted"],"not_affected_if":["patched-version"],"how_to_check":"- Check the installed Parse Server version with `npm ls parse-server` and compare it to `8.6.105` (8.x line) or `9.10.5-alpha.6` (9.x line)\n- unknown whether the sources list other check steps","fix":"- Upgrade parse-server to `8.6.105` or later on the 8.x line, or to `9.10.5-alpha.6` or later on the 9.x line\n- unknown whether a configuration workaround exists","status":"open","published_at":"2026-10-27T00:17:11+00:00","first_seen_at":"2026-10-27T00:25:55+00:00","triaged_at":"2026-10-27T00:26:44+00:00","updated_at":"2026-10-27T00:26:44+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-27T00:26:44Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade parse-server to `8.6.105` or later on the 8.x line, or to `9.10.5-alpha.6` or later on the 9.x line\n- unknown whether a configuration workaround exists","reach":"internet","title":"Parse Server: relation queries skip owner ACL check, leaking linked object IDs","impact":"low","summary":"Parse Server does not validate the owning object ID in $relatedTo relation queries, so passing a query operator in place of an ID bypasses the owner's ACL check. A client with read access to one object of the owning class can learn which readable objects link to owners it cannot read.","category":"package","nicknames":[],"who_cares":["parse-server","node.js","self-hosted","backend-as-a-service"],"confidence":0.6,"needs_auth":"yes","worst_case":"Clients learn IDs of hidden objects linked to protected owners.","analyst_note":"Check the NVD entry and the Parse Server release notes for the fixed versions and any workaround; the sources here give no fix guidance beyond the version numbers.","how_to_check":"- Check the installed Parse Server version with `npm ls parse-server` and compare it to `8.6.105` (8.x line) or `9.10.5-alpha.6` (9.x line)\n- unknown whether the sources list other check steps","needs_analyst":true,"not_affected_if":["patched-version"],"who_is_affected":"Applications running Parse Server before 8.6.105 or 9.0.0 before 9.10.5-alpha.6 that expose $relatedTo relation queries to clients with read access to at least one object of a class that has owning-object ACLs. Teams on other versions, or on managed hosting that has already patched, can skip it. unknown whether the sources name specific deployment patterns beyond this.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000657,"input_tokens":3351,"output_tokens":644,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116801':15A,18A '-2026':14A,17A '8.6.105':87C '9.0.0':89C '9.10.5':91C 'access':65B,125C 'acl':7A,59B,119C 'alpha.6':92C 'backend':20B 'backend-as-a-servic':19B 'bypass':55B,114C 'cannot':82B,146C 'check':8A,60B,120C 'class':72B,134C 'client':62B,122C 'cve':13A,16A 'disclos':136C 'host':31B 'id':12A,40B,54B,113C 'instead':109C 'leak':9A 'learn':74B 'least':128C 'link':10A,78B,141C 'node.js':24B 'object':11A,39B,68B,77B,98C,112C,118C,130C,139C,144C 'one':67B,129C 'oper':49B,108C 'own':38B,71B,97C,117C,133C,143C 'owner':6A,57B,80B 'owning-object':116C 'packag':25B 'pars':1A,27B,32B,84C 'parse-serv':26B 'pass':46B 'place':51B 'queri':4A,44B,48B,103C,107C 'read':64B,83B,124C,147C 'readabl':76B,138C 'refer':99C 'relat':3A,43B,102C 'relatedto':42B,101C 'self':30B 'self-host':29B 'server':2A,28B,33B,85C 'servic':23B 'skip':5A 'suppli':105C 'valid':36B,95C","nicknames":[],"mitigations":[],"who_affected":"Applications running Parse Server before 8.6.105 or 9.0.0 before 9.10.5-alpha.6 that expose $relatedTo relation queries to clients with read access to at least one object of a class that has owning-object ACLs. Teams on other versions, or on managed hosting that has already patched, can skip it. unknown whether the sources name specific deployment patterns beyond this.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T00:17:11+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/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","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116801","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116801","severity":null,"published_at":"2026-10-27T00:17:11+00:00","modified_at":"2026-10-27T00:17:11+00:00","first_seen_at":"2026-10-27T00:25:55+00:00","fetched_at":"2026-10-27T00:25:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}