---
id: "CVE-2026-121945"
kind: "vulnerability"
aliases: ["CVE-2026-121945"]
title: "CoopCycle web: any courier can read and change every incident"
severity: "high"
cvss: 7.6
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["coopcycle", "coopcycle-web", "delivery-platform", "package", "self-hosted"]
not_affected_if: ["coopcycle-web-6.20.1-or-later"]
published_at: "2026-11-04T13:17:29+00:00"
first_seen_at: "2026-11-04T13:27:03+00:00"
updated_at: "2026-11-04T13:27:59+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121945", "first_seen_at": "2026-11-04T13:27:03+00:00"}]
---

# CoopCycle web: any courier can read and change every incident

CoopCycle's web app checks only that a user is a courier before letting them read and modify incidents, so any courier account can access incidents belonging to other stores. An attacker with a courier account can enumerate sequential incident ids and use the incident action endpoint to re-price, cancel or reschedule other stores' orders and tasks.

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

## How to check

- Check the installed `coopcycle-web` version in the project's package manifest and confirm whether it is below `6.20.1`
- Review whether courier accounts can call `PUT /api/incidents/{id}/action` on the deployed instance

## Fix

- `coopcycle-web` `6.20.1` or later (per the advisory description: fixed in versions before 6.20.1 are affected)

## Timeline

- 2026-11-04T13:27:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121945

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/coopcycle-coopcycle-web-before-6.20.1-idor-via-incident-resource-and-action-endpoint
- [fix] Patch: github.com https://github.com/coopcycle/coopcycle-web/commit/d997393d128afa1febe34e8f295b9511c12d19a0

## From the sources

CoopCycle coopcycle-web before 6.20.1 contains a broken access control vulnerability that allows any courier to read and modify every incident because Incident operations only check ROLE_COURIER. Attackers can enumerate sequential incident ids and use PUT /api/incidents/{id}/action to re-price, cancel or reschedule other stores' orders and tasks.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_