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CVE-2026-40020

3.1 LOW

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

Published: 2026-05-12 · Last updated: 2026-05-18

Severity and scoring

CVSS
3.1 LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE
CWE-284

Affected products

VendorProduct
dovecotdovecot
open-xchangedovecot

Description

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: NVD

References

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