---
id: "CVE-2026-86008"
kind: "vulnerability"
aliases: ["CVE-2026-86008"]
title: "Mailu: domain managers can take over higher-privileged admin accounts"
severity: "high"
cvss: 7.2
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["docker", "email", "infrastructure", "mailu", "self-hosted"]
not_affected_if: ["managed-hosting", "no-domain-managers"]
published_at: "2026-10-16T17:17:51+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T03:29:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86008", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# Mailu: domain managers can take over higher-privileged admin accounts

Mailu is a self-hosted mail server shipped as Docker images. A domain manager can reset passwords or obtain tokens for an administrative account or a domain manager with more privileges, taking over that account.

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

## How to check

- Check the Mailu image or release tag in use and compare it against the fixed commit `8577c929b4ade04d3cd4210cf036601abd793556`
- Review which accounts hold the domain manager role in the Mailu admin interface

## Fix

- Update Mailu to a build that includes commit `8577c929b4ade04d3cd4210cf036601abd793556`
- Review admin and domain manager accounts for unexpected password resets or tokens after upgrading

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86008

## From the sources

Mailu is a mail server distributed as a set of Docker images. Prior to 8577c929b4ade04d3cd4210cf036601abd793556, a domain manager targeting an administrative account or another domain manager with greater privileges can reset passwords or obtain tokens for that account. This authorization failure allows a domain manager to take over a higher-privileged account and exercise that account's permissions. This vulnerability is addressed by commit 8577c929b4ade04d3cd4210cf036601abd793556.

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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_