{"id":"CVE-2026-114056","kind":"vulnerability","aliases":["CVE-2026-114056"],"related":[],"title":"ArcadeDB: read-only users can alter edge type schema flags","description":"ArcadeDB from 26.8.1 before 26.10.1 contains an authorization bypass vulnerability that allows read-only users to modify edge type lightweight and unique schema flags without UPDATE_SCHEMA permission. Attackers can send a bare ALTER TYPE edgeType WITH lightweight = true command over the HTTP, gRPC, or Bolt command API to persistently alter edge storage declarations.","summary":"ArcadeDB from 26.8.1 before 26.10.1 lets read-only users change edge type lightweight and unique schema flags without the UPDATE_SCHEMA permission. An attacker with read-only access can send a bare ALTER TYPE command over HTTP, gRPC or Bolt to persistently change how edge storage is declared.","severity":"medium","cvss":5.3,"epss":0.00215,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["arcadedb","databases","package","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"- Check the installed ArcadeDB version and whether it is in the range `26.8.1` to before `26.10.1`\n- Review which accounts have read-only access on the ArcadeDB server, since those are the ones that can exploit this","fix":"- Upgrade ArcadeDB to `26.10.1` or later\n- Until upgraded, restrict read-only accounts on the HTTP, gRPC and Bolt APIs","status":"open","published_at":"2026-10-21T01:17:28+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","triaged_at":"2026-10-25T04:22:24+00:00","updated_at":"2026-10-25T04:22:24+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T04:22:24Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade ArcadeDB to `26.10.1` or later\n- Until upgraded, restrict read-only accounts on the HTTP, gRPC and Bolt APIs","reach":"network","title":"ArcadeDB: read-only users can alter edge type schema flags","impact":"medium","summary":"ArcadeDB from 26.8.1 before 26.10.1 lets read-only users change edge type lightweight and unique schema flags without the UPDATE_SCHEMA permission. An attacker with read-only access can send a bare ALTER TYPE command over HTTP, gRPC or Bolt to persistently change how edge storage is declared.","category":"package","nicknames":[],"who_cares":["arcadedb","self-hosted","databases"],"confidence":0.7,"needs_auth":"yes","worst_case":"read-only user persistently alters edge storage schema flags","analyst_note":"","how_to_check":"- Check the installed ArcadeDB version and whether it is in the range `26.8.1` to before `26.10.1`\n- Review which accounts have read-only access on the ArcadeDB server, since those are the ones that can exploit this","needs_analyst":false,"not_affected_if":["default-config"],"who_is_affected":"Teams running ArcadeDB between versions 26.8.1 and 26.10.1 where some users hold read-only rather than schema-update rights. Exposure depends on whether untrusted or low-privilege users can reach the command API over HTTP, gRPC or Bolt. Deployments that run only trusted users with full schema rights are less exposed.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000629,"input_tokens":3407,"output_tokens":577,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-114056':14A,17A '-2026':13A,16A '26.10.1':28B,78C '26.8.1':26B,76C 'access':53B 'allow':85C 'alter':7A,58B,108C,125C 'api':122C 'arcadedb':1A,18B,24B,74C 'attack':48B,103C 'author':81C 'bare':57B,107C 'bolt':65B,120C 'bypass':82C 'chang':34B,68B 'command':60B,114C,121C 'contain':79C 'cve':12A,15A 'databas':19B 'declar':73B,128C 'edg':8A,35B,70B,92C,126C 'edgetyp':110C 'flag':11A,41B,98C 'grpc':63B,118C 'host':23B 'http':62B,117C 'let':29B 'lightweight':37B,94C,112C 'modifi':91C 'packag':20B 'permiss':46B,102C 'persist':67B,124C 'read':3A,31B,51B,87C 'read-on':2A,30B,50B,86C 'schema':10A,40B,45B,97C,101C 'self':22B 'self-host':21B 'send':55B,105C 'storag':71B,127C 'true':113C 'type':9A,36B,59B,93C,109C 'uniqu':39B,96C 'updat':44B,100C 'user':5A,33B,89C 'vulner':83C 'without':42B,99C","nicknames":[],"mitigations":[],"who_affected":"Teams running ArcadeDB between versions 26.8.1 and 26.10.1 where some users hold read-only rather than schema-update rights. Exposure depends on whether untrusted or low-privilege users can reach the command API over HTTP, gRPC or Bolt. Deployments that run only trusted users with full schema rights are less exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T01:17:28+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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-2026-114056","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114056","severity":null,"published_at":"2026-10-21T01:17:28+00:00","modified_at":"2026-10-21T01:17:28+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-114056","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114056","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:55+00:00","fetched_at":"2026-10-24T13:15:55+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"}