---
id: "CVE-2026-120328"
kind: "vulnerability"
aliases: ["CVE-2026-120328"]
title: "Click tracking middleware skips recipient code check, exposing newsletter recipient data"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["email-marketing", "newsletter", "package", "self-hosted"]
not_affected_if: ["no-click-tracking", "no-newsletter-software"]
published_at: "2026-11-03T10:17:17+00:00"
first_seen_at: "2026-11-03T10:20:15+00:00"
updated_at: "2026-11-03T10:20:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120328", "first_seen_at": "2026-11-03T10:20:15+00:00"}]
---

# Click tracking middleware skips recipient code check, exposing newsletter recipient data

The click tracking middleware does not validate a recipient's authentication code when that code is left out of a request. An unauthenticated attacker can retrieve personal data of newsletter recipients that is embedded in the links of sent mails.

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

## Timeline

- 2026-11-03T10:20:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120328

## From the sources

The click tracking middleware does not validate the authentication code of a recipient if the code is omitted. Unauthenticated attackers can retrieve personal data of newsletter recipients, which is inserted into links of sent mails.

---

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