{"id":"CVE-2026-126807","kind":"vulnerability","aliases":["CVE-2026-126807"],"related":[],"title":"WuzAPI: authenticated users can read other tenants' chat metadata","description":"WuzAPI through 1.1.0 contains a cross-tenant information disclosure vulnerability in the GetHistory handler that allows authenticated users to view other tenants' chat metadata. Attackers with message history enabled can request GET /chat/history with chat_jid=index to list every user's internal ID, stored chat JIDs, and last-message times.","summary":"WuzAPI through 1.1.0 has a GetHistory handler flaw that lets any logged-in user see other tenants' chat metadata. An attacker with message history enabled can list every user's internal ID, stored chat JIDs and last-message times via GET /chat/history with chat_jid=index.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["multi-tenant","other","self-hosted","whatsapp","wuzapi"],"not_affected_if":["message-history-disabled","single-tenant"],"how_to_check":"- Check the WuzAPI version in use; affected versions are those through `1.1.0`.\n- Check whether message history is enabled in the WuzAPI configuration.","fix":"- Patch available on github.com, per the linked fix; the fixed version is unknown from the sources.","status":"open","published_at":"2026-11-11T21:16:44+00:00","first_seen_at":"2026-11-11T21:29:08+00:00","triaged_at":"2026-11-11T21:30:56+00:00","updated_at":"2026-11-11T21:30:56+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-11T21:30:56Z","model":"claude-haiku-5-5","output":{"fix":"- Patch available on github.com, per the linked fix; the fixed version is unknown from the sources.","reach":"network","title":"WuzAPI: authenticated users can read other tenants' chat metadata","impact":"low","summary":"WuzAPI through 1.1.0 has a GetHistory handler flaw that lets any logged-in user see other tenants' chat metadata. An attacker with message history enabled can list every user's internal ID, stored chat JIDs and last-message times via GET /chat/history with chat_jid=index.","audience":"businesses","category":"other","nicknames":[],"who_cares":["wuzapi","whatsapp","self-hosted","multi-tenant"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"Other tenants' internal IDs and chat metadata are readable by any authenticated user.","analyst_note":"Confirm the fixed WuzAPI version from the GitHub patch and whether the reach is internet-facing by default.","how_to_check":"- Check the WuzAPI version in use; affected versions are those through `1.1.0`.\n- Check whether message history is enabled in the WuzAPI configuration.\n- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["single-tenant","message-history-disabled"],"who_is_affected":"Teams running WuzAPI, a WhatsApp API gateway, with multiple tenants and message history enabled. Single-tenant deployments where all users are trusted are less exposed. The sources do not say whether the flaw is reachable from the internet by default.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.00075,"input_tokens":4609,"output_tokens":578,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-126807':12A,15A '-2026':11A,14A '/chat/history':68B,106C '1.1.0':27B,75C 'allow':89C 'attack':46B,98C 'authent':2A,90C 'chat':8A,43B,59B,70B,96C,108C,119C 'contain':76C 'cross':79C 'cross-ten':78C 'cve':10A,13A 'disclosur':82C 'enabl':50B,102C 'everi':53B,113C 'flaw':32B 'get':67B,105C 'gethistori':30B,86C 'handler':31B,87C 'histori':49B,101C 'host':22B 'id':57B,117C 'index':72B,110C 'inform':81C 'intern':56B,116C 'jid':60B,71B,109C,120C 'last':63B,123C 'last-messag':62B,122C 'let':34B 'list':52B,112C 'log':37B 'logged-in':36B 'messag':48B,64B,100C,124C 'metadata':9A,44B,97C 'multi':17B 'multi-ten':16B 'read':5A 'request':104C 'see':40B 'self':21B 'self-host':20B 'store':58B,118C 'tenant':7A,18B,42B,80C,95C 'time':65B,125C 'user':3A,39B,54B,91C,114C 'via':66B 'view':93C 'vulner':83C 'whatsapp':23B 'wuzapi':1A,24B,25B,73C","nicknames":[],"mitigations":[],"who_affected":"Teams running WuzAPI, a WhatsApp API gateway, with multiple tenants and message history enabled. Single-tenant deployments where all users are trusted are less exposed. The sources do not say whether the flaw is reachable from the internet by default.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["medium","multitenant","other","selfhosted","whatsapp","wuzapi"],"campaign_type":null,"search_a":"'-126807':12A,15A '-2026':11A,14A 'authent':2A 'chat':8A 'cve':10A,13A 'metadata':9A 'read':5A 'tenant':7A 'user':3A 'wuzapi':1A","search_b":"'/chat/history':68B '1.1.0':27B 'attack':46B 'chat':43B,59B,70B 'enabl':50B 'everi':53B 'flaw':32B 'get':67B 'gethistori':30B 'handler':31B 'histori':49B 'host':22B 'id':57B 'index':72B 'intern':56B 'jid':60B,71B 'last':63B 'last-messag':62B 'let':34B 'list':52B 'log':37B 'logged-in':36B 'messag':48B,64B 'metadata':44B 'multi':17B 'multi-ten':16B 'see':40B 'self':21B 'self-host':20B 'store':58B 'tenant':18B,42B 'time':65B 'user':39B,54B 'via':66B 'whatsapp':23B 'wuzapi':24B,25B","search_c":"'/chat/history':106C '1.1.0':75C 'allow':89C 'attack':98C 'authent':90C 'chat':96C,108C,119C 'contain':76C 'cross':79C 'cross-ten':78C 'disclosur':82C 'enabl':102C 'everi':113C 'get':105C 'gethistori':86C 'handler':87C 'histori':101C 'id':117C 'index':110C 'inform':81C 'intern':116C 'jid':109C,120C 'last':123C 'last-messag':122C 'list':112C 'messag':100C,124C 'metadata':97C 'request':104C 'store':118C 'tenant':80C,95C 'time':125C 'user':91C,114C 'view':93C 'vulner':83C 'wuzapi':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T21:16:44+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-2026-126807","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126807","severity":null,"published_at":"2026-11-11T21:16:44+00:00","modified_at":"2026-11-11T21:16:44+00:00","first_seen_at":"2026-11-11T21:29:08+00:00","fetched_at":"2026-11-11T21:29:08+00:00","note":null}],"documents":[{"id":128979,"url":"https://github.com/asternic/wuzapi/commit/f5332fa21b7c8a742f9ee565328ea776ad0c8040","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"},{"id":128980,"url":"https://www.vulncheck.com/advisories/wuzapi-through-1.1.0-cross-tenant-information-disclosure-via-chat-history","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}