Vulnerability · Published Oct 16, 2026 · Assigned by GitHub_M

CVE-2026-86008Mailu domain managers can take over higher-privileged accounts

High 7.2

In plain English

A high-severity privilege mismanagement in Mailu from Mailu. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.3%top 75.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Mailu	Mailu	< 8577c929b4ade04d3cd4210cf036601abd793556

Weakness: CWE-285, CWE-269 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/Mailu/Mailu/security/advisories/GHSA-9pv5-rm76-3qwj x_refsource_CONFIRM
https://github.com/Mailu/Mailu/issues/2685 x_refsource_MISC
https://github.com/Mailu/Mailu/pull/4050 x_refsource_MISC
https://github.com/Mailu/Mailu/commit/8577c929b4ade04d3cd4210cf036601abd793556 x_refsource_MISC