---
id: "CVE-2026-126947"
page: "https://infrastack.ai/live/CVE-2026-126947"
kind: "vulnerability"
aliases: ["CVE-2026-126947"]
title: "Zipline: stored open redirect lets users set malicious short link destinations"
severity: "medium"
cvss: 5.4
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-untrusted-users", "zipline-4.5.0-or-later"]
published_at: "2026-11-13T10:18:01+00:00"
first_seen_at: "2026-11-13T10:47:28+00:00"
updated_at: "2026-11-13T10:56:48+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126947", "first_seen_at": "2026-11-13T10:47:28+00:00"}]
exploit_sources: []
---

# Zipline: stored open redirect lets users set malicious short link destinations

Link for people: https://infrastack.ai/live/CVE-2026-126947 (this .md is for agents)

Zipline before 4.5.0 does not validate the URL scheme when users create short links through POST /api/user/urls. An authenticated user can store javascript: or attacker-controlled destinations, so visitors of a trusted short link are sent to phishing or malware pages.

_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, for example by reading the `version` field in its `package.json` or the image tag in your deployment.
- Confirm whether untrusted users can create accounts or short links on your instance.

## Fix

- Zipline `4.5.0` or later, per the sources.

## Timeline

- 2026-11-13T10:47:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126947

## Documents

- [advisory] Vendor advisory: github.com https://github.com/diced/zipline/security/advisories/GHSA-6q69-pgmp-w93c
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/zipline-before-4.5.0-stored-open-redirect-via-post-api-user-urls

## From the sources

Zipline before 4.5.0 contains a stored open redirect vulnerability that allows authenticated users to set arbitrary short URL destinations by abusing missing scheme validation in POST /api/user/urls. Attackers can store javascript: URIs or attacker-controlled URLs as destinations, causing visitors of the trusted short link to be redirected to phishing or malware pages.

---

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