---
id: "CVE-2026-126936"
page: "https://infrastack.ai/live/CVE-2026-126936"
kind: "vulnerability"
aliases: ["CVE-2026-126936"]
title: "Zipline: race condition lets users exceed invitation and upload quotas"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "other"
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"]
published_at: "2026-11-13T10:18:00+00:00"
first_seen_at: "2026-11-13T10:47:27+00:00"
updated_at: "2026-11-13T10:56:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126936", "first_seen_at": "2026-11-13T10:47:27+00:00"}]
exploit_sources: []
---

# Zipline: race condition lets users exceed invitation and upload quotas

Link for people: https://infrastack.ai/live/CVE-2026-126936 (this .md is for agents)

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.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Zipline affected range not listed fixed no fixed version listed

## How to check

- Check the installed Zipline version and whether it is below `4.7.0`
- Look at whether open registration by invitation is enabled on your instance

## Fix

- Zipline: upgrade to `4.7.0` or later

## Timeline

- 2026-11-13T10:47:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126936

## Documents

- [advisory] Vendor advisory: github.com https://github.com/diced/zipline/security/advisories/GHSA-wq7g-g9f8-8q2p
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/zipline-before-4.7.0-race-condition-in-invite-and-quota-limits

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_