---
id: "CVE-2026-126942"
page: "https://infrastack.ai/live/CVE-2026-126942"
kind: "vulnerability"
aliases: ["CVE-2026-126942"]
title: "Zipline: missing authorization lets users move other users' files into folders"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "zipline", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["file-sharing", "package", "self-hosted", "zipline"]
not_affected_if: ["managed-hosting", "single-user-instance"]
published_at: "2026-11-13T10:18:01+00:00"
first_seen_at: "2026-11-13T10:47:27+00:00"
updated_at: "2026-11-13T10:56:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126942", "first_seen_at": "2026-11-13T10:47:27+00:00"}]
exploit_sources: []
---

# Zipline: missing authorization lets users move other users' files into folders

Link for people: https://infrastack.ai/live/CVE-2026-126942 (this .md is for agents)

Zipline, a self-hosted file sharing server, lets any logged-in user reparent other users' files by supplying their file IDs when creating a folder. An attacker can learn victims' file URLs and remove those files from the victims' folder views.

_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; the sources state the flaw is in versions before `4.6.2`.
- Confirm whether Zipline is reachable by users who hold accounts on the instance.

## Fix

- Zipline: upgrade to `4.6.2` or later (per the NVD description).

## Timeline

- 2026-11-13T10:47:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126942

## Documents

- [advisory] Vendor advisory: github.com https://github.com/diced/zipline/security/advisories/GHSA-84c9-r2mj-p9pp
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/zipline-before-4.6.2-missing-authorization-via-post-api-user-folders

## From the sources

Zipline before 4.6.2 contains a missing authorization vulnerability in POST /api/user/folders that allows authenticated users to reparent other users' files by supplying their file IDs. Attackers can harvest file IDs from public folders and create a folder seeded with them, disclosing victims' file URLs and removing those files from their folder views.

---

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