{"id":"CVE-2026-115334","kind":"vulnerability","aliases":["CVE-2026-115334"],"related":[],"title":"Lotus: authorization bypass lets any user join other organizations","description":"Lotus through 0.10.2 contains an authorization bypass vulnerability in ChangeUserOrganizationView.post that allows authenticated users to join any organization by supplying its UUID. Self-registered attackers who know another organization's UUID can send a POST request to /app/switch_organization/ to access that tenant's data and billing configuration.","summary":"Lotus through 0.10.2 has an authorization flaw in ChangeUserOrganizationView.post that lets any logged-in user join an organization by supplying its UUID. An attacker who knows another tenant's UUID can reach that tenant's data and billing configuration.","severity":"high","cvss":7.6,"epss":0.00236,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["lotus","multi-tenant","other","self-hosted"],"not_affected_if":["self-registration-disabled","single-organization"],"how_to_check":"- Check the Lotus version in use: `unknown` if the sources do not say how it is installed or where the version is recorded.\n- Look for the `/app/switch_organization/` endpoint in the deployed application and confirm whether self-registration is enabled.","fix":"- Upgrade Lotus past `0.10.2`: the fixed version is unknown from the sources.\n- Until patched, disable self-registration or restrict `/app/switch_organization/` to trusted users.","status":"open","published_at":"2026-10-22T11:17:52+00:00","first_seen_at":"2026-10-23T21:57:31+00:00","triaged_at":"2026-10-25T03:14:23+00:00","updated_at":"2026-10-25T03:14:23+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-25T03:14:23Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Lotus past `0.10.2`: the fixed version is unknown from the sources.\n- Until patched, disable self-registration or restrict `/app/switch_organization/` to trusted users.","reach":"internet","title":"Lotus: authorization bypass lets any user join other organizations","impact":"medium","summary":"Lotus through 0.10.2 has an authorization flaw in ChangeUserOrganizationView.post that lets any logged-in user join an organization by supplying its UUID. An attacker who knows another tenant's UUID can reach that tenant's data and billing configuration.","category":"other","nicknames":[],"who_cares":["lotus","self-hosted","multi-tenant"],"confidence":0.6,"needs_auth":"yes","worst_case":"Attacker reads another tenant's data and billing configuration","analyst_note":"Find the fixed Lotus version and the upstream advisory at the NVD page; confirm whether self-registration is on by default.","how_to_check":"- Check the Lotus version in use: `unknown` if the sources do not say how it is installed or where the version is recorded.\n- Look for the `/app/switch_organization/` endpoint in the deployed application and confirm whether self-registration is enabled.","needs_analyst":true,"not_affected_if":["single-organization","self-registration-disabled"],"who_is_affected":"Deployments of Lotus up to and including 0.10.2 where users can self-register and where multiple organizations (tenants) share one instance. A single-tenant install with self-registration closed to outsiders is much less exposed. Teams running only a single organization can likely skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000633,"input_tokens":3376,"output_tokens":590,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-115334':12A,15A '-2026':11A,14A '/app/switch_organization':102C '0.10.2':26B,66C 'access':104C 'allow':75C 'anoth':51B,92C 'attack':48B,89C 'authent':76C 'author':2A,29B,69C 'bill':62B,110C 'bypass':3A,70C 'changeuserorganizationview.post':32B,73C 'configur':63B,111C 'contain':67C 'cve':10A,13A 'data':60B,108C 'flaw':30B 'host':23B 'join':7A,40B,79C 'know':50B,91C 'let':4A,34B 'log':37B 'logged-in':36B 'lotus':1A,16B,24B,64C 'multi':18B 'multi-ten':17B 'organ':9A,42B,81C,93C 'post':99C 'reach':56B 'regist':88C 'request':100C 'self':22B,87C 'self-host':21B 'self-regist':86C 'send':97C 'suppli':44B,83C 'tenant':19B,52B,58B,106C 'user':6A,39B,77C 'uuid':46B,54B,85C,95C 'vulner':71C","nicknames":[],"mitigations":[],"who_affected":"Deployments of Lotus up to and including 0.10.2 where users can self-register and where multiple organizations (tenants) share one instance. A single-tenant install with self-registration closed to outsiders is much less exposed. Teams running only a single organization can likely skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-22T11:17:52+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/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-2026-115334","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115334","severity":null,"published_at":"2026-10-22T11:17:52+00:00","modified_at":"2026-10-22T16:53:20+00:00","first_seen_at":"2026-10-23T21:57:31+00:00","fetched_at":"2026-10-23T22:29:02+00:00","note":null},{"source":"epss","external_id":"CVE-2026-115334","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115334","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T07:15:51+00:00","fetched_at":"2026-10-24T07:15:51+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"}