{"id":"CVE-2026-122008","kind":"vulnerability","aliases":["CVE-2026-122008"],"related":[],"title":"Oqtane Framework: authenticated users can make server fetch internal URLs","description":"Oqtane Framework before 10.3.0 contains a server-side request forgery vulnerability in the UploadFile endpoint of FileController.cs that allows authenticated registered users to make the server fetch arbitrary URLs by supplying a caller-controlled url parameter to HttpClient.GetStreamAsync without validating the scheme, host, or IP address. Attackers can request internal resources such as cloud instance metadata services or localhost-bound management interfaces, save the fetched response as a file in their own user folder, and retrieve it via the download endpoint to exfiltrate sensitive internal data or enumerate internal network hosts and ports.","summary":"Oqtane Framework's file upload endpoint fetches any URL a logged-in user supplies without checking the address. An attacker can use the server to read internal resources such as cloud metadata or localhost services and download the result.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["dotnet","oqtane","runtime","self-hosted"],"not_affected_if":["auth-required","no-registered-users","version-10.3.0-or-later"],"how_to_check":"- Check the installed Oqtane version in the project's package references, for example `Oqtane.Framework` in the `.csproj` file\n- Confirm whether `FileController.cs` is present and whether the UploadFile endpoint is reachable by registered users","fix":"- Oqtane Framework: move to `10.3.0` or later","status":"open","published_at":"2026-11-04T15:17:43+00:00","first_seen_at":"2026-11-04T15:27:31+00:00","triaged_at":"2026-11-04T15:28:27+00:00","updated_at":"2026-11-04T15:28:27+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-04T15:28:27Z","model":"claude-haiku-5-5","output":{"fix":"- Oqtane Framework: move to `10.3.0` or later","reach":"internet","title":"Oqtane Framework: authenticated users can make server fetch internal URLs","impact":"medium","summary":"Oqtane Framework's file upload endpoint fetches any URL a logged-in user supplies without checking the address. An attacker can use the server to read internal resources such as cloud metadata or localhost services and download the result.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["oqtane","dotnet","self-hosted"],"confidence":0.7,"fix_status":"available","needs_auth":"yes","worst_case":"internal services and cloud metadata readable by attacker","analyst_note":"","how_to_check":"- Check the installed Oqtane version in the project's package references, for example `Oqtane.Framework` in the `.csproj` file\n- Confirm whether `FileController.cs` is present and whether the UploadFile endpoint is reachable by registered users","plain_action":"","needs_analyst":false,"not_affected_if":["version-10.3.0-or-later","no-registered-users","auth-required"],"who_is_affected":"Sites running Oqtane Framework older than 10.3.0 where registered users can reach the file upload endpoint. The request must come from a logged-in account, so sites with only anonymous or admin-only access are less exposed. Sites that run Oqtane behind network controls that block cloud metadata and internal hosts reduce the impact but do not remove the flaw.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000704,"input_tokens":4278,"output_tokens":552,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-122008':13A,16A '-2026':12A,15A '10.3.0':66C 'address':41B,110C 'allow':82C 'arbitrari':91C 'attack':43B,111C 'authent':3A,83C 'bound':125C 'caller':97C 'caller-control':96C 'check':39B 'cloud':54B,118C 'contain':67C 'control':98C 'cve':11A,14A 'data':151C 'dotnet':17B 'download':60B,145C 'endpoint':28B,78C,146C 'enumer':153C 'exfiltr':148C 'fetch':8A,29B,90C,130C 'file':26B,134C 'filecontroller.cs':80C 'folder':139C 'forgeri':73C 'framework':2A,24B,64C 'host':22B,107C,156C 'httpclient.getstreamasync':102C 'instanc':119C 'interfac':127C 'intern':9A,50B,114C,150C,154C 'ip':109C 'localhost':57B,124C 'localhost-bound':123C 'log':34B 'logged-in':33B 'make':6A,87C 'manag':126C 'metadata':55B,120C 'network':155C 'oqtan':1A,18B,23B,63C 'paramet':100C 'port':158C 'read':49B 'regist':84C 'request':72C,113C 'resourc':51B,115C 'respons':131C 'result':62B 'retriev':141C 'runtim':19B 'save':128C 'scheme':106C 'self':21B 'self-host':20B 'sensit':149C 'server':7A,47B,70C,89C 'server-sid':69C 'servic':58B,121C 'side':71C 'suppli':37B,94C 'upload':27B 'uploadfil':77C 'url':10A,31B,92C,99C 'use':45B 'user':4A,36B,85C,138C 'valid':104C 'via':143C 'vulner':74C 'without':38B,103C","nicknames":[],"mitigations":[],"who_affected":"Sites running Oqtane Framework older than 10.3.0 where registered users can reach the file upload endpoint. The request must come from a logged-in account, so sites with only anonymous or admin-only access are less exposed. Sites that run Oqtane behind network controls that block cloud metadata and internal hosts reduce the impact but do not remove the flaw.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["dotnet","medium","oqtane","runtime","selfhosted"],"campaign_type":null,"first_public_at":"2026-11-04T15:17:43+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/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-2026-122008","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122008","severity":null,"published_at":"2026-11-04T15:17:43+00:00","modified_at":"2026-11-04T15:17:43+00:00","first_seen_at":"2026-11-04T15:27:31+00:00","fetched_at":"2026-11-04T15:27:31+00:00","note":null}],"documents":[{"id":67843,"url":"https://github.com/oqtane/oqtane.framework/releases/tag/v10.3.0","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":67846,"url":"https://www.vulncheck.com/advisories/oqtane-framework-before-ssrf-via-file-upload-from-url","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"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}