{"id":"CVE-2026-113596","kind":"vulnerability","aliases":["CVE-2026-113596"],"related":[],"title":"Webstudio: missing authorization lets logged-in users read other projects' data","description":"Webstudio before 0.256.0 contains a missing authorization vulnerability that allows authenticated users to read other users' project data via the publishedBuilds and findManyByIds tRPC procedures. Attackers who know another user's project UUID can query the /trpc handler to retrieve publish history, titles, domains, preview images, and latest builds.","summary":"Webstudio before 0.256.0 lacks an authorization check on the publishedBuilds and findManyByIds tRPC procedures. A logged-in user who knows another user's project UUID can read that project's publish history, titles, domains, preview images and latest builds.","severity":"low","cvss":3.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["multi-user","other","self-hosted","webstudio"],"not_affected_if":["single-user-instance","version-0.256.0-or-later"],"how_to_check":"- Check the installed Webstudio version; versions before `0.256.0` are affected\n- Review whether the self-hosted or deployed instance allows multiple user accounts\n- unknown whether other configuration changes exposure","fix":"- Upgrade Webstudio to `0.256.0` or later\n- unknown whether a workaround exists before upgrading","status":"open","published_at":"2026-10-20T16:17:08+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","triaged_at":"2026-10-25T04:47:46+00:00","updated_at":"2026-10-25T04:47:46+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-25T04:47:46Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Webstudio to `0.256.0` or later\n- unknown whether a workaround exists before upgrading","reach":"internet","title":"Webstudio: missing authorization lets logged-in users read other projects' data","impact":"low","summary":"Webstudio before 0.256.0 lacks an authorization check on the publishedBuilds and findManyByIds tRPC procedures. A logged-in user who knows another user's project UUID can read that project's publish history, titles, domains, preview images and latest builds.","category":"other","nicknames":[],"who_cares":["webstudio","self-hosted","multi-user"],"confidence":0.7,"needs_auth":"yes","worst_case":"Other users' project titles, domains and build data readable by any logged-in user","analyst_note":"","how_to_check":"- Check the installed Webstudio version; versions before `0.256.0` are affected\n- Review whether the self-hosted or deployed instance allows multiple user accounts\n- unknown whether other configuration changes exposure","needs_analyst":false,"not_affected_if":["version-0.256.0-or-later","single-user-instance"],"who_is_affected":"Teams running Webstudio before `0.256.0` where more than one user has an account on the same instance. Single-user installs have less exposure because the attacker must be another authenticated user who knows a project UUID. Teams already on `0.256.0` or later are not affected.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000591,"input_tokens":3328,"output_tokens":517,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-113596':15A,18A '-2026':14A,17A '/trpc':103C '0.256.0':29B,69C 'allow':76C 'anoth':48B,95C 'attack':92C 'authent':77C 'author':3A,32B,73C 'build':66B,115C 'check':33B 'contain':70C 'cve':13A,16A 'data':12A,84C 'domain':61B,110C 'findmanybyid':38B,89C 'handler':104C 'histori':59B,108C 'host':25B 'imag':63B,112C 'know':47B,94C 'lack':30B 'latest':65B,114C 'let':4A 'log':6A,43B 'logged-in':5A,42B 'miss':2A,72C 'multi':20B 'multi-us':19B 'preview':62B,111C 'procedur':40B,91C 'project':11A,51B,56B,83C,98C 'publish':58B,107C 'publishedbuild':36B,87C 'queri':101C 'read':9A,54B,80C 'retriev':106C 'self':24B 'self-host':23B 'titl':60B,109C 'trpc':39B,90C 'user':8A,21B,45B,49B,78C,82C,96C 'uuid':52B,99C 'via':85C 'vulner':74C 'webstudio':1A,26B,27B,67C","nicknames":[],"mitigations":[],"who_affected":"Teams running Webstudio before `0.256.0` where more than one user has an account on the same instance. Single-user installs have less exposure because the attacker must be another authenticated user who knows a project UUID. Teams already on `0.256.0` or later are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T16:17:08+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/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-2026-113596","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113596","severity":null,"published_at":"2026-10-20T16:17:08+00:00","modified_at":"2026-10-23T02:16:55+00:00","first_seen_at":"2026-10-23T21:57:20+00:00","fetched_at":"2026-10-23T22:28:58+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"}