{"id":"CVE-2026-126938","kind":"vulnerability","aliases":["CVE-2026-126938"],"related":[],"title":"Zipline: forged upload offsets bypass quota and exhaust server disk","description":"Zipline before 4.6.4 contains a resource allocation vulnerability that allows authenticated users to bypass chunked-upload size and quota checks by forging Content-Range offsets and totals. Attackers can send tiny chunks to the partial upload endpoint with large declared offsets, causing the server to create oversized files and exhaust disk space.","summary":"Zipline, a self-hosted file sharing server, lets a logged-in user forge Content-Range offsets on chunked uploads. An attacker can send tiny chunks with large declared offsets to make the server create oversized files and fill its disk.","severity":"high","cvss":7.1,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["file-uploads","package","self-hosted","zipline"],"not_affected_if":["managed-hosting","version-4.6.4-or-later"],"how_to_check":"- Check the installed Zipline version; the sources say versions before `4.6.4` are affected.\n- Review whether user accounts can upload files to the partial upload endpoint.","fix":"- Zipline: move to `4.6.4` or later.","status":"open","published_at":"2026-11-13T10:18:00+00:00","first_seen_at":"2026-11-13T10:47:27+00:00","triaged_at":"2026-11-13T10:52:53+00:00","updated_at":"2026-11-13T10:52:53+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-13T10:52:53Z","model":"claude-haiku-5-5","output":{"fix":"- Zipline: move to `4.6.4` or later.","reach":"network","title":"Zipline: forged upload offsets bypass quota and exhaust server disk","impact":"medium","summary":"Zipline, a self-hosted file sharing server, lets a logged-in user forge Content-Range offsets on chunked uploads. An attacker can send tiny chunks with large declared offsets to make the server create oversized files and fill its disk.","audience":"businesses","category":"package","nicknames":[],"who_cares":["zipline","self-hosted","file-uploads"],"confidence":0.7,"fix_status":"available","needs_auth":"yes","worst_case":"Attacker fills server disk by forging upload size checks","analyst_note":"product_ecosystem not set; Zipline is a vendor app, confirm vendor advisory on GitHub for exact fixed-version details.","how_to_check":"- Check the installed Zipline version; the sources say versions before `4.6.4` are affected.\n- Review whether user accounts can upload files to the partial upload endpoint.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["managed-hosting","version-4.6.4-or-later"],"who_is_affected":"Self-hosted Zipline instances before 4.6.4 where users can log in and upload files through chunked uploads. Instances that restrict uploads to trusted accounts have a smaller exposure but are still affected by the flaw itself. Teams using a managed Zipline service can leave it to the provider.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000736,"input_tokens":4605,"output_tokens":552,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-126938':13A,16A '-2026':12A,15A '4.6.4':70C 'alloc':74C 'allow':77C 'attack':48B,97C 'authent':78C 'bypass':5A,81C 'caus':111C 'check':88C 'chunk':45B,52B,83C,101C 'chunked-upload':82C 'contain':71C 'content':41B,92C 'content-rang':40B,91C 'creat':61B,115C 'cve':11A,14A 'declar':55B,109C 'disk':10A,67B,120C 'endpoint':106C 'exhaust':8A,119C 'file':18B,30B,63B,117C 'file-upload':17B 'fill':65B 'forg':2A,39B,90C 'host':23B,29B 'larg':54B,108C 'let':33B 'log':36B 'logged-in':35B 'make':58B 'offset':4A,43B,56B,94C,110C 'overs':62B,116C 'packag':20B 'partial':104C 'quota':6A,87C 'rang':42B,93C 'resourc':73C 'self':22B,28B 'self-host':21B,27B 'send':50B,99C 'server':9A,32B,60B,113C 'share':31B 'size':85C 'space':121C 'tini':51B,100C 'total':96C 'upload':3A,19B,46B,84C,105C 'user':38B,79C 'vulner':75C 'ziplin':1A,24B,25B,68C","nicknames":[],"mitigations":[],"who_affected":"Self-hosted Zipline instances before 4.6.4 where users can log in and upload files through chunked uploads. Instances that restrict uploads to trusted accounts have a smaller exposure but are still affected by the flaw itself. Teams using a managed Zipline service can leave it to the provider.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["fileuploads","high","package","selfhosted","zipline"],"campaign_type":null,"search_a":"'-126938':13A,16A '-2026':12A,15A 'bypass':5A 'cve':11A,14A 'disk':10A 'exhaust':8A 'forg':2A 'offset':4A 'quota':6A 'server':9A 'upload':3A 'ziplin':1A","search_b":"'attack':48B 'chunk':45B,52B 'content':41B 'content-rang':40B 'creat':61B 'declar':55B 'disk':67B 'file':18B,30B,63B 'file-upload':17B 'fill':65B 'forg':39B 'host':23B,29B 'larg':54B 'let':33B 'log':36B 'logged-in':35B 'make':58B 'offset':43B,56B 'overs':62B 'packag':20B 'rang':42B 'self':22B,28B 'self-host':21B,27B 'send':50B 'server':32B,60B 'share':31B 'tini':51B 'upload':19B,46B 'user':38B 'ziplin':24B,25B","search_c":"'4.6.4':70C 'alloc':74C 'allow':77C 'attack':97C 'authent':78C 'bypass':81C 'caus':111C 'check':88C 'chunk':83C,101C 'chunked-upload':82C 'contain':71C 'content':92C 'content-rang':91C 'creat':115C 'declar':109C 'disk':120C 'endpoint':106C 'exhaust':119C 'file':117C 'forg':90C 'larg':108C 'offset':94C,110C 'overs':116C 'partial':104C 'quota':87C 'rang':93C 'resourc':73C 'send':99C 'server':113C 'size':85C 'space':121C 'tini':100C 'total':96C 'upload':84C,105C 'user':79C 'vulner':75C 'ziplin':68C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-07-06T19:32:15+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/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-2026-126938","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126938","severity":null,"published_at":"2026-11-13T10:18:00+00:00","modified_at":"2026-11-13T10:18:00+00:00","first_seen_at":"2026-11-13T10:47:27+00:00","fetched_at":"2026-11-13T10:47:27+00:00","note":null}],"documents":[{"id":145237,"url":"https://github.com/diced/zipline/security/advisories/GHSA-fp8p-hf8g-fw65","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-07-06T19:32:15+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":145238,"url":"https://www.vulncheck.com/advisories/zipline-before-4.6.4-upload-quota-bypass-via-forged-content-range-headers","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"}