---
id: "CVE-2026-16648"
kind: "vulnerability"
aliases: ["CVE-2026-16648"]
title: "Drupal Mailer Plus Log: sensitive data written to log file"
severity: "low"
cvss: 3.8
epss: 0.00196
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["drupal", "other", "php", "self-hosted"]
not_affected_if: ["module-not-installed"]
published_at: "2026-10-22T02:17:01+00:00"
first_seen_at: "2026-10-23T21:57:30+00:00"
updated_at: "2026-10-25T04:43:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16648", "first_seen_at": "2026-10-23T21:57:30+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-16648", "first_seen_at": "2026-10-24T07:15:52+00:00"}]
---

# Drupal Mailer Plus Log: sensitive data written to log file

The Drupal Mailer Plus Log module writes sensitive information into its log file. An attacker who already holds stolen credentials for remote services could read that data from the logs.

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

## How to check

- Check the installed Mailer Plus Log version with `drush pm:list --filter=mailer_plus_log` or in composer.lock for `drupal/mailer_plus_log`
- unknown

## Fix

- Upgrade Mailer Plus Log to a version later than `1.2.7` (the sources list 1.2.7 as affected; the fixed version is unknown)
- Rotate any credentials that may have been written to logs

## Timeline

- 2026-10-23T21:57:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-16648
- 2026-10-24T07:15:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-16648

## From the sources

Insertion of Sensitive Information into Log File vulnerability in Drupal Mailer Plus Log allows Remote Services with Stolen Credentials. This issue affects Mailer Plus Log versions: from 0.0.0 to 1.2.7.

---

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