This page tracks the Alpine Linux fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-40020 →

ALPINE-CVE-2026-40020

Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes fold...

Original description

The description as published by the source.

Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Alpine:v3.23 dovecot

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.4-r0"}]}]

Alpine:v3.24 dovecot

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.4-r0"}]}]

References

advisory security.alpinelinux.org