CVE-2026-40874

MEDIUM

mailcow: dockerized missing authorization on Forwarding Hosts delete action

Title source: cna

Description

mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, no administrator verification takes place when deleting Forwarding Hosts with `/api/v1/delete/fwdhost`. Any authenticated user can call this API. Checks are only applied for edit/add actions, but deletion can still significantly disrupt the mail service. Version 2026-03b fixes the vulnerability.

References (1)

[X_Refsource_Confirm] https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-jjxh-rm7p-hjc3

Scores

CVSS v4 6.0

EPSS 0.0004

EPSS Percentile 13.0%

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (1)

mailcow/mailcow-dockerized < 2026-03b

Published Apr 21, 2026

Tracked Since Apr 22, 2026