{"id":"CVE-2026-126936","kind":"vulnerability","aliases":["CVE-2026-126936"],"related":[],"title":"Zipline: race condition lets users exceed invitation and upload quotas","description":"Zipline before 4.7.0 contains a race condition vulnerability that allows users to bypass invitation usage limits, upload storage quotas, and shortened-URL quotas through concurrent requests. Attackers can send overlapping registration, upload, or URL creation requests that pass checks against stale state, creating extra accounts and exceeding administrator-configured resource quotas.","summary":"Zipline before 4.7.0 has a race condition that lets concurrent requests pass quota checks against stale state. An attacker can create extra accounts from one invitation and exceed storage and shortened-URL quotas set by an administrator.","severity":"medium","cvss":6.0,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Zipline","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["other","self-hosted","zipline"],"not_affected_if":["no-invitations","no-quotas","version-4.7.0-or-later"],"how_to_check":"- Check the installed Zipline version and whether it is below `4.7.0`\n- Look at whether open registration by invitation is enabled on your instance","fix":"- Zipline: upgrade to `4.7.0` 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":"2026-11-13T10:56:31+00:00","updated_at":"2026-11-13T10:56:31+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-13T10:56:31Z","model":"claude-haiku-5-5","output":{"fix":"- Zipline: upgrade to `4.7.0` or later","reach":"network","title":"Zipline: race condition lets users exceed invitation and upload quotas","impact":"low","summary":"Zipline before 4.7.0 has a race condition that lets concurrent requests pass quota checks against stale state. An attacker can create extra accounts from one invitation and exceed storage and shortened-URL quotas set by an administrator.","audience":"businesses","category":"other","nicknames":[],"who_cares":["zipline","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"extra accounts created and quotas exceeded beyond administrator limits","analyst_note":"Confirm the exact affected version range and the fix commit at the GitHub advisory linked from the NVD entry; the sources give only 'before 4.7.0'.","how_to_check":"- Check the installed Zipline version and whether it is below `4.7.0`\n- Look at whether open registration by invitation is enabled on your instance","plain_action":"","product_name":"Zipline","needs_analyst":true,"not_affected_if":["version-4.7.0-or-later","no-invitations","no-quotas"],"who_is_affected":"Teams that self-host Zipline with invitation-based registration or per-user upload and short-URL quotas are exposed. Instances without invitations or quotas, or those running 4.7.0 or later, are not affected by this flaw.","user_interaction":"no","product_ecosystem":"vendor","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000737,"input_tokens":4617,"output_tokens":550,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-126936':13A,16A '-2026':12A,15A '4.7.0':25B,63C 'account':45B,106C 'administr':60B,110C 'administrator-configur':109C 'allow':70C 'attack':41B,88C 'bypass':73C 'check':36B,100C 'concurr':32B,86C 'condit':3A,29B,67C 'configur':111C 'contain':64C 'creat':43B,104C 'creation':96C 'cve':11A,14A 'exceed':6A,50B,108C 'extra':44B,105C 'host':21B 'invit':7A,48B,74C 'let':4A,31B 'limit':76C 'one':47B 'overlap':91C 'pass':34B,99C 'quota':10A,35B,56B,79C,84C,113C 'race':2A,28B,66C 'registr':92C 'request':33B,87C,97C 'resourc':112C 'self':20B 'self-host':19B 'send':90C 'set':57B 'shorten':54B,82C 'shortened-url':53B,81C 'stale':38B,102C 'state':39B,103C 'storag':51B,78C 'upload':9A,77C,93C 'url':55B,83C,95C 'usag':75C 'user':5A,71C 'vulner':68C 'ziplin':1A,22B,23B,61C 'zipline':17A","nicknames":[],"mitigations":[],"who_affected":"Teams that self-host Zipline with invitation-based registration or per-user upload and short-URL quotas are exposed. Instances without invitations or quotas, or those running 4.7.0 or later, are not affected by this flaw.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":["zipline"],"ptokens":["zipline"],"labels":["medium","other","selfhosted","vendor","zipline"],"campaign_type":null,"search_a":"'-126936':13A,16A '-2026':12A,15A 'condit':3A 'cve':11A,14A 'exceed':6A 'invit':7A 'let':4A 'quota':10A 'race':2A 'upload':9A 'user':5A 'ziplin':1A 'zipline':17A","search_b":"'4.7.0':25B 'account':45B 'administr':60B 'attack':41B 'check':36B 'concurr':32B 'condit':29B 'creat':43B 'exceed':50B 'extra':44B 'host':21B 'invit':48B 'let':31B 'one':47B 'pass':34B 'quota':35B,56B 'race':28B 'request':33B 'self':20B 'self-host':19B 'set':57B 'shorten':54B 'shortened-url':53B 'stale':38B 'state':39B 'storag':51B 'url':55B 'ziplin':22B,23B","search_c":"'4.7.0':63C 'account':106C 'administr':110C 'administrator-configur':109C 'allow':70C 'attack':88C 'bypass':73C 'check':100C 'concurr':86C 'condit':67C 'configur':111C 'contain':64C 'creat':104C 'creation':96C 'exceed':108C 'extra':105C 'invit':74C 'limit':76C 'overlap':91C 'pass':99C 'quota':79C,84C,113C 'race':66C 'registr':92C 'request':87C,97C 'resourc':112C 'send':90C 'shorten':82C 'shortened-url':81C 'stale':102C 'state':103C 'storag':78C 'upload':77C,93C 'url':83C,95C 'usag':75C 'user':71C 'vulner':68C 'ziplin':61C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-08-16T21:48:14+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:H/AT:P/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-2026-126936","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126936","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":145233,"url":"https://github.com/diced/zipline/security/advisories/GHSA-wq7g-g9f8-8q2p","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-08-16T21:48:14+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":145234,"url":"https://www.vulncheck.com/advisories/zipline-before-4.7.0-race-condition-in-invite-and-quota-limits","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"}